FORM 2 THE PATENTS ACT, 1970 (39 of 1970) & THE PATENTS RULES, 2003 COMPLETE SPECIFICATION (See section 10, rule 13) “RECEPTION DEVICE, RECEPTION METHOD, PROGRAM, DECRYPTION PROCESSING DEVICE, RECEPTION PROCESSING SYSTEM, AND INFORMATION PROCESSING DEVICE” SONY CORPORATION, of 1-7-1, Konan, Minato-ku, Tokyo 108-0075, Japan The following specification particularly describes the invention and the manner in which it is to be performed. 2 Description Title of Invention RECEPTION DEVICE, RECEPTION METHOD, PROGRAM, DECRYPTION PROCESSING DEVICE, RECEPTION PROCESSING 5 SYSTEM, AND INFORMATION PROCESSING DEVICE Technical Field [0001] 10 The present technology relates to a reception device, a reception method, a program, a decryption processing device, a reception processing system, and an information processing device. More specifically, the present technology relates to a reception device and the like for receiving content from a digital broadcast system or a distribution server on a network, and the like. 15 Background Art [0002] A next generation standard of the common interface plus (CI+) in digital video broadcasting (DVB), which is being operated mainly in Europe, is now under 20 review. The conventional CI+ is used to prevent illicit outflow of broadcast content by performing mutual authentication and protection of a communication channel between a host (mainly a TV set) and a conditional access module (CAM). Development of a standard for the next generation CI+ is under way, and communication system content is also reviewed as a scope of protection targets. 25 Generally, the communication system content is protected by the digital rights management (DRM) technology. [0003] The DRM technology can protect a communication channel between a server and a client against illicit behavior such as eavesdropping (wiretapping) or 30 falsification of content. On the one hand, since content outputted from a receiver cannot be protected by the DRM, a digital watermark technology is generally used as 3 means of detecting unauthorized copying or falsification of content after the content is outputted (see, for example, Patent literature 1 below). Citation List 5 Patent Literature [0004] Patent Literature 1: JP 2002-084510A Summary of Invention 10 Technical Problem [0005] Content mentioned herein which should be protected against unauthorized use includes two kinds: broadcast content and communication content. In a conventional technology, for both contents, a communication channel from a 15 distribution source (broadcast equipment, a content server) to a receiver (TV set) can be protected by the conditional access system (CAS)/DRM technology. On the one hand, since there is no protection capability after content is outputted from a receiver, it was difficult to stop outflow of an unauthorized copy once a copy is made by illicit means such as shooting TV screen with a video camera or bypassing a content 20 protection technology. [0006] In the conventional technology, as a method for inserting a digital watermark in content, a method is possible in which a transmitting side embeds a sender-unique ID and a receiver side embeds a receiver-unique ID. In a broadcast 25 service multicasting to many unspecified receivers, since it is impossible to specify a single receiver at a distribution destination, the transmitting side cannot embed a receiver ID. [0007] In addition, it is also difficult for the receiver side to determine a sender30 unique ID in an integrated manner. That is, it is possible that the transmitting side and the receiver side respectively insert a digital watermark doubly. However, such 4 adverse effects as difficulty in standardization to an identical digital watermark technology among all of multiple broadcast stations and communication providers, deterioration in the picture quality or the sound quality due to superimposition of a digital watermark, and the like are expected. 5 [0008] An object of the present technology is to make it possible to satisfactorily specify an outflow route for content. Solution to Problem 10 [0009] According to a concept of the present technology, there is provided a reception device including a content reception unit configured to receive content, a digital watermark information acquisition unit configured to acquire information specifying an outflow route for the content to create a digital watermark, and a 15 content output unit configured to embed a digital watermark in the received content by using the acquired information and configured to output the content. [0010] In the present technology, the content reception unit receives content. In this case, for example, content is received from a digital broadcast system and/or a 20 distribution server on a network. The digital watermark information acquisition unit acquires information specifying an outflow route for content to create a digital watermark. This information includes at least information identifying a transmission source of the content and information identifying an own device. Then, using information to create a digital watermark, the content output unit embeds 25 a digital watermark in the received content and outputs the content. [0011] As such, in the present technology, a digital watermark is embedded in content to be outputted, by use of information specifying an outflow route for that content, and it becomes possible to specify the outflow route if the content is used in 30 an unauthorized manner. In addition, the effect of deterrence which obviates illicit outflow of content can also be expected. 5 [0012] In addition, in the present technology, for example, when information which should be used to create a digital watermark is added to the received content, the digital watermark information acquisition unit may be configured to further acquire this information. In this case, it becomes possible to use useful 5 information to specify an outflow route of content added at a transmission source of the content, to embed a digital watermark in this content and output the content. [0013] According to a concept of the present technology, there is provided a 10 reception device including a content reception unit configured to receive encrypted content, an interface unit configured to transmit the received content to external equipment and configured to receive decrypted content from the external equipment, and a content output unit configured to embed, by using information specifying an outflow route for the content to create a digital watermark, a digital watermark in the 15 content received from the external equipment and configured to output the content. [0014] In the present technology, the content reception unit receives encrypted content. The interface unit transmits the received content to the external equipment and receives decrypted content from the external equipment. Then, the content 20 output unit embeds a digital watermark in the content received from the external equipment and outputs the content. In this case, information specifying an outflow route for content to create a digital watermark is used. In this case, for example, information to create a digital watermark which is added to the content received from the external equipment is used. For example, the information to create a digital 25 watermark includes at least information identifying a transmission source of the content, information identifying an own device, and information identifying the external equipment. [0015] As such, in the present technology, a digital watermark is embedded in 30 content to be outputted, by use of information specifying an outflow route for that content, and it becomes possible to specify the outflow route if the content is used in 6 an unauthorized manner. In addition, the effect of deterrence which obviates illicit outflow of content can also be expected. [0016] In addition, in the present disclosure, for example, when the content output unit determines that a digital watermark has already been 5 embedded in content received from external equipment, the content output unit may be configured not to embed a digital watermark in the content received from the external equipment. In this case, the interface unit further receives functional information of the external equipment from the external equipment, and the content output unit may be 10 configured to determine based on the received functional information whether or not a digital watermark has been embedded in the content received from the external equipment. In this case, it is possible to avoid deterioration in the picture quality or the sound quality due to superimposition of digital watermarks. [0017] 15 According to a concept of the present technology, there is provided a decryption processing device including an interface unit configured to receive encrypted content from external equipment and configured to transmit decrypted content to the external equipment, a decryption unit configured to perform a decryption processing on the encrypted content to acquire the decrypted content, and 20 a digital watermark embedment unit configured to embed a digital watermark in the content to be transmitted by using information specifying an outflow route for the content to create a digital watermark. [0018] In the present technology, the interface unit receives encrypted content from 25 external equipment and transmits decrypted content to this external equipment. The decryption unit performs a decryption processing on the encrypted content to acquire the decrypted content. Then, the digital watermark embedment unit uses information specifying an outflow route for content to create a digital watermark, to embed a digital watermark in the content to be transmitted. For example, the 30 information to create a digital watermark includes at least information identifying a transmission source of the content, information identifying the external equipment, 7 and information identifying an own device. [0019] As such, in the present technology, it becomes possible to transmit to external equipment content in which a digital watermark is embedded by use of information specifying an outflow route. Therefore, when 5 content in which a digital watermark is embedded by use of information specifying an outflow route is outputted from external equipment, the external equipment does not have to actually perform a processing to embed a digital watermark in the content, which thus alleviates processing load. 10 [0020] In addition, in the present technology, for example, content includes video data for each inter-frame predictive encoded frame, and the digital watermark embedment unit may be configured to embed a digital watermark in intra-frame video data. In this case, it becomes possible to alleviate processing load for 15 embedding a digital watermark. [0021] According to a concept of the present technology, there is provided a decryption processing device including an interface unit configured to receive encrypted content from external equipment and configured to transmit decrypted 20 content to the external equipment, a decryption unit configured to perform a decryption processing on the encrypted content to acquire the decrypted content, and a digital watermark information addition unit configured to add, to the content to be transmitted, information specifying an outflow route for the content to create a digital watermark. 25 [0022] In the present technology, the interface unit receives encrypted content from external equipment and transmits decrypted content to this external equipment. The decryption unit performs a decryption processing on the encrypted content to acquire the decrypted content. Then, the information addition unit adds information 30 specifying an outflow route for this content to create a digital watermark, to content to be transmitted. For example, the information to create a digital watermark 8 includes at least information identifying a transmission source of the content, information identifying the external equipment, and information identifying oven device. [0023] As such, in the present technology, it becomes possible 5 to transmit to external equipment content to which information specifying an outflow route to create a digital watermark is added. Therefore, when content in which a digital watermark is embedded by use of information specifying an outflow route is outputted by external equipment, this external equipment can easily acquire the 10 information specifying the outflow route, which thus alleviates processing load. [0024] According to a concept of the present technology, there is provided a reception processing system including a reception device and a decryption processing device. The reception device includes a content reception unit 15 configured to receive encrypted content, an interface unit configured to transmit the received content to the decryption processing device and configured to receive decrypted content from the decryption processing device, and a content output unit configured to embed a digital watermark in the content received from the decryption processing device and output the content by using information specifying an outflow 20 route for the content to create a digital watermark which is added to the content. The decryption processing device includes an interface unit configured to receive the encrypted content from the reception device and configured to transmit the decrypted content to the reception device, a decryption unit configured to perform a decryption processing on the encrypted content to acquire the decrypted content, and a digital 25 watermark information addition unit configured to add the information to create the digital watermark to the content to be transmitted. [0025] According to a concept of the present technology, there is provided a reception processing system including a reception device, and a decryption 30 processing device. The reception device includes a content reception unit configured to receive encrypted content, an interface unit configured to transmit the 9 received content to the decryption processing device and configured to receive decrypted content from the decryption processing device, and a content output unit configured to output the received content. The decryption processing device includes an interface unit configured to receive the encrypted content from the reception device and transmit the decrypted content to the 5 reception device, a decryption unit configured to perform a decryption processing on the encrypted content to acquire the decrypted content, and a digital watermark embedment unit configured to embed a digital watermark in the content to be transmitted, by using information specifying an outflow route for the content to create a digital watermark. 10 [0026] According to a concept of the present technology, there is provided an information processing device including a content acquisition unit configured to acquire content, a digital watermark information acquisition unit configured to acquire information specifying an outflow route for the content to create a digital 15 watermark, and a content output unit configured to embed a digital watermark in the acquired content and output the content, by using the acquired information. [0027] In the present technology, the content acquisition unit receives content. The digital watermark information acquisition unit acquires information specifying 20 an outflow route for content to create a digital watermark. Then, the content output unit uses the information to create a digital watermark to embed a digital watermark in the acquired content. As such, in the present technology, a digital watermark is embedded in content to be outputted by use of information specifying an outflow route for that content, and it becomes possible to specify the outflow route when the 25 content is used in an unauthorized manner. In addition, the effect of deterrence to obviate illicit outflow of content can also be expected. Advantageous Effects of Invention [0028] 30 According to the present technology, it is possible to satisfactorily specify an outflow route for content. 10 Brief Description of Drawings [0029] [FIG. 1] FIG. 1 is a block diagram showing a configuration example of a content transmission and reception system 5 as an embodiment. [FIG. 2] FIG. 2 is a block diagram showing a configuration example of a reception device and a CAM module. [FIG. 3] FIG. 3 is a block diagram showing a configuration example of a reception device and a CAM module. 10 [FIG. 4] FIG. 4 is a flow chart showing one example of a processing procedure of a reception device (Host) and a CAM module in a case in which broadcast content is received. [FIG. 5] FIG. 5 is a sequence diagram showing an operation example of broadcast transmission equipment, a reception device (Host) and a CAM module in a case in 15 which broadcast content is received. [FIG. 6] FIG. 6 is a flow chart showing one example of a processing procedure (an A/V player of a reception device is a main control entity) of a reception device (Host) and a CAM module in a case in which communication content is received. [FIG. 7] FIG. 7 is a sequence diagram showing an operation example of broadcast 20 transmission equipment, a reception device (Host), and a CAM module in a case in which communication content is received. [FIG. 8] FIG. 8 is a flow chart showing one example of a processing procedure (a CI+ module of a reception device is a main control entity) of a reception device (Host) and a CAM module in a case in which communication content is received. 25 [FIG. 9] FIG. 9 is a sequence diagram showing an operation example of broadcast transmission equipment, a reception device (Host) and a CAM module in a case in which communication content is received. [FIG. 10] FIG. 10 is a flow chart showing one example of a processing procedure (a DRM client of a CAM module is a main control entity) of a reception device (Host) 30 and a CAM module in a case in which communication content is received. [FIG. 11] FIG. 11 is a sequence diagram showing an operation example of broadcast 11 transmission equipment, a reception device (Host) and a CAM module in a case in which communication content is received. [FIG. 12] FIG. 12 is a block diagram showing other configuration example of a content transmission and reception system. [FIG. 13] FIG. 13 is a block diagram showing other configuration 5 example of a reception device and a CAM module. [FIG. 14] FIG. 14 is a block diagram showing other configuration example of a reception device and a CAM module. 10 Description of Embodiments [0030] Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described. Note that a description will be given in the following order: 15 1. First embodiment 2. Modifications [0031] <1. Embodiment> [Configuration example of a content transmission and reception system] 20 FIG. 1 shows a configuration example of a content transmission and reception system 10 as an embodiment. The content transmission and reception system 10 has broadcast transmission equipment 11, and a content distribution server 12 and a digital rights management (DRM) server 13 which are connected to a network (communication network) 14. The content transmission and reception 25 system 10 also has a reception device 16 connected to a customer premise network system (LAN) by way of an edge router 15, and a conditional access module (CAM) module 17 and a smart card 18 which are connected to this reception device 16. [0032] The broadcast transmission equipment 11 transmits so-called broadcast 30 streams such as audio/visual (A/V) content and data broadcast and the like as broadcast wave, by digital terrestrial broadcasting or broadcast satellite 12 (BS)/communications satellite (CS) broadcasting. A/V content is encrypted by a conditional access system (CAS) system of the broadcast transmission equipment to prevent unauthorized use in a communication channel between the broadcast transmission broadcast 11 and the CAM module 17 of the reception device 16. However, protection by the CAS is not necessarily 5 required. [0033] The content distribution server 12 is positioned on a network 14 such as an Internet or a content delivery network (CDN). Similar to the broadcast transmission equipment 11 described above, A/V content or related data and the like are placed 10 and content is delivered to the reception device 16 connected by way of the network 14. A/V content is protected by the digital rights management (DRM) technology. However, protection by DRM is not necessarily required. [0034] Similar to the content distribution server 12, the DRM server 13 is 15 positioned on the network 14 such as the Internet or the CDN. The DRM server 13 delivers related data such as a decryption key for decrypting content, use conditions and the like to the reception device 16 connected by way of the network 14. [0035] As the reception device 16, for example, a television receiver (TV set) or a 20 set top box (STB) and the like are possible. This reception device 16 has a function to receive A/V content from broadcasting or communications and present the A/V content to users. The reception device 16 also has a function to present data broadcast application and the like to be superimposed on A/V content. [0036] 25 [Detailed configuration example of a reception device and a CAM module] FIG. 2 shows a detailed configuration example of a reception device 16 and a CAM module 17. The reception device 16 has a broadcast interface (broadcast I/F) 101, middleware (Middle-ware) 102, and a communication interface (communication I/F) 103. 30 [0037] The reception device 16 also has application (Application) 104, a common 13 interface (Common I/F) 105, and a CI+ module (CI+module) 106. Furthermore, the reception device 16 has a demultiplexer (De-multiplexer) 107, a decoder (Decoder) 108, an A/V player (A/V players) 109, and a digital watermark generator 110. [0038] The broadcast interface 101 acquires a broadcast signal 5 to be transmitted from the broadcast transmission equipment 11. The middleware 102 analyzes the broadcast signal acquired by the broadcast interface 101, performs a processing such as a channel selection processing and the like, and obtains desired content (AV streams). The communication interface 103 communicates with the content 10 distribution server 12 by way of the network 14 to acquire content. The communication interface 103 also communicates with the DRM server 13 by way of the network 14 to obtain a DRM key. [0039] The application 104 is software for controlling functions of the reception 15 device 16. This application 104 displays an icon on a display screen, enabling a variety of settings and selections. The common interface 105 communicates (transmits and receives) content and a control signal with the CAM module 17. The CI+ module 106 performs mutual authentication with the CAM module 17 to protect a communication channel. 20 [0040] The demultiplexer 107 extracts encrypted streams such as video, audio, subtitles and the like from broadcast content after being decrypted by the CAM module 17. The decoder 108 performs a decode processing on the encrypted streams which have been extracted by the demultiplexer 107, such as video, audio, 25 subtitles and the like, to obtain video data, audio data, subtitles data and the like. The A/V player 109 extracts encrypted streams such as video, audio, subtitles and the like from communication content after being decrypted by the CAM module 17, and further performs the decode processing to obtain video data, audio data, subtitles data and the like. 30 [0041] The digital watermark generator 110 embeds a digital watermark in data 14 after being decoded, such as video data, and outputs the data. The digital watermark generator 110 uses information to create a digital watermark and embeds a digital watermark. This information is considered information which is helpful in specifying an outflow route for content. The information includes, for example, information identifying a transmission source of content, information 5 identifying an own device, information identifying the CAM module 17, current time (decode time of content), other information related to rendering of content and the like. [0042] As the information identifying a transmission source of content, for example, 10 “Network ID”, “Transport stream ID”, or “Service ID” is used for broadcast content, and “content server ID”, for example, is used for communication content. In addition, “Host ID” is used as the information identifying an own device, and “CICAM ID” is used as the information identifying the CAM module 17. [0043] 15 When a digital watermark has already been embedded by the CAM module 17, the digital watermark generator 110 directly outputs data after being decoded without performing a processing of embedding a digital watermark in the decoded data. In this case, any deterioration in the picture quality or the sound quality due to superimposition of digital watermarks can be avoided. The digital watermark 20 generator 110 can determine based on functional information to be acquired from the CAM module 17, for example, whether or not a digital watermark is embedded in data after being decoded. [0044] When the reception device 16 and the CAM module 17 perform mutual 25 authentication with CI+, the reception device 16 and the CAM module 17 exchange a public key certificate of each other and perform an authentication processing. Although a detailed description is omitted, a format of this public key certificate is provided in the request for comments (RFC) 3280. An extension descriptor can be defined for a public key certificate. Here, for example, the following descriptor is 30 newly defined. Exchanging this descriptor on the CI+ protocol, the reception device 16 and the CAM module 17 can learn mutual digital watermark functions and 15 whether or not there is a digital watermark. [0045] Watermark Capability ::= SEQUENCE { capability INTEGER 5 } [0046] [Table 1] Value Definition 0 No digital watermark function 1 A digital watermark embedded (I-frame) 2 A digital watermark information embedded (SEI) 3 A digital watermark information embedded (Adaptation field of MPEG2TS) 4 or more Reserved [0047] 10 When “capability = 0”, it shows “there is no digital watermark function”. In addition, when “capability = 1”, it shows “a digital watermark is embedded in an I-frame (intra-frame)”. In addition, when “capability = 2”, it shows “digital watermark information is embedded in supplement enhancement information (SEI)”. Furthermore, when “capability = 3”, it shows “digital watermark information is 15 embedded in an “adaptation field of MPEG2TS”. Here, the digital watermark information means the above-mentioned information to create a digital watermark. [0048] When information to create a digital watermark is added to content after being decrypted which is transmitted from the CAM module 17, for example, the 20 digital watermark generator 110 can use that information. The digital watermark generator 110 can learn based on functional information to be acquired from the CAM module 17, for example, whether or not the information to create a digital watermark is added to the content after being decrypted (See Table 1). [0049] 25 A method for retrieving from content information to create a digital 16 watermark and handing the information to the digital watermark generator 110 differs depending on a location where the digital watermark information is embedded (positioned). For example, if an encoding scheme is H.264/AVC (ISO/IEC 14496- 10) and the information is embedded in an SEI field, the information is extracted by the demultiplexer 107. However, if an embedded location is 5 another field, it is possible that a different module will process. This is by way of example, however, and a module which actually processes differs depending on implementation. [0050] In addition, the digital watermark generator 110 can independently acquire 10 and use information to create a digital watermark. In this case, it is also possible that information which should be used to create a digital watermark (information which is useful to specify an outflow route for content) is added in advance to broadcast content or communication content by a transmitting side (service side). In this case, for example, if the encoding scheme is H264/AVC, a method for 15 arranging by the transmitting side data to be determined by a servicer in the SEI field, and the like are possible. In such a case, the digital watermark generator 110 further acquires and uses that information as information to create a digital watermark. In this case, it becomes possible to use useful information for specifying an outflow route for content which has been added at a transmission 20 source of the content and embed a digital watermark. [0051] As described above, the information to create a digital watermark (digital watermark information) is added to the SEI field if the encoding scheme is H264/AVC. In this case, for example, the reserved SEI message 25 “reserved_sei_message” shown below can be used. However, it is also possible to define a new SEI message and add digital watermark information. [0052] reserved_sei_message (payloadSize) { for(i=0; i Note that in the embodiments described above, the CAM module 17, 17A connected to the reception device 16, 16A through the common interface decrypts broadcast content and communication content. However, it is needless to say that 25 the present technology can similarly apply to any reception device in which these reception device and CAM module are integrated. [0113] In addition, in the embodiments described above, it was described that when the CAM module 17, 17A adds digital watermark information to content, the digital 30 watermark information is embedded in an SEI field or an adaptation field of MPEG2TS. However, a location where digital watermark information is embedded 31 is not limited to the SEI field or the adaptation field of MPEG2TS. [0114] In addition, in the embodiments described above, it was shown that the reception device 16, 16A not only receives broadcast content from the broadcast transmission equipment 11, but also receives communication 5 content from the content distribution server 12 connected to the network 14 and processes the communication content. However, the present disclosure can similarly apply to a reception device which receives and processes either broadcast content or communication content. 10 [0115] In addition, in the embodiments described above, the reception device 16, 16A or the CAM module 17, 17A embeds a digital watermark in content. However, it is also possible that the broadcast transmission equipment 11 or the content distribution server 12 embeds a digital watermark in content and delivers the content. 15 For example, if the content distribution server 12 embeds a digital watermark in communication content, the content distribution server 12 delivers the content as per a request of a reception device. Thus, as digital watermark information, information identifying a reception device or a CAM module (“Host ID, “CICAM ID” and the like) can be easily included, in addition to information identifying a 20 transmission source (“content server ID” and the like). [0116] Additionally, the present technology may also be configured as below. (1) A reception device including: 25 a content reception unit configured to receive content; a digital watermark information acquisition unit configured to acquire information specifying an outflow route for the content to create a digital watermark; and a content output unit configured to embed a digital watermark in the 30 received content by using the acquired information and configured to output the content. 32 (2) The reception device according to (1), wherein the content reception unit receives the content from a digital broadcast system and/or a distribution server on a network. 5 (3) The reception device according to (1) or (2), wherein the information to create a digital watermark includes at least information identifying a transmission source of the content and information identifying an own device. (4) 10 The reception device according to any one of (1) to (3), wherein when the information to be used to create a digital watermark is added to the received content, the digital watermark information acquisition unit further acquires the information. (5) A reception method including: 15 a step of receiving content; a step of acquiring information specifying an outflow route for the content to create a digital watermark; and a step of embedding a digital watermark in the received content and outputting the content by using the acquired information. 20 (6) A program causing a computer to function as: content reception means for receiving content; digital watermark information acquisition means for acquiring information specifying an outflow route for the content to create a digital watermark; and 25 output means for embedding a digital watermark in the decrypted content and outputting the content by using the acquired information. (7) A reception device including: a content reception unit configured to receive encrypted content; 30 an interface unit configured to transmit the received content to external equipment and configured to receive decrypted content from the external equipment; 33 and a content output unit configured to embed, by using information specifying an outflow route for the content to create a digital watermark, a digital watermark in the content received from the external equipment and configured to output the 5 content. (8) The reception device according to (7), wherein the content output unit uses the information to create the digital watermark which is added to the content received from the external equipment. 10 (9) The reception device according to (7) or (8), wherein when determining that a digital watermark has already been embedded in the content received from the external equipment, the content output unit does not embed a digital watermark in the content received from the external equipment. 15 (10) The reception device according to (9), wherein the interface unit further receives functional information of the external equipment from the external equipment, and wherein the content output unit determines, based on the received functional 20 information, whether or not the digital watermark has been embedded in the content received from the external equipment. (11) The reception device according to any one of (7) to (10), wherein the information to create a digital watermark includes at least 25 information identifying a transmission source of the content, information identifying an own device, and information identifying the external equipment. (12) A decryption processing device including: an interface unit configured to receive encrypted content from external 30 equipment and configured to transmit decrypted content to the external equipment; a decryption unit configured to perform a decryption processing on the 34 encrypted content to acquire the decrypted content; and a digital watermark embedment unit configured to embed a digital watermark in the content to be transmitted by using information specifying an outflow route for the content to create a digital watermark. 5 (13) The decryption processing unit according to (12), wherein the content includes video data for each inter-frame predictive encoded frame, and wherein the digital watermark embedment unit embeds a digital watermark 10 in video data of an intra-frame. (14) The decryption processing device according to (12) or (13), wherein the information to create a digital watermark includes at least information identifying a transmission source of the content, information identifying 15 the external equipment, and information identifying an own device. (15) A decryption processing device including: an interface unit configured to receive encrypted content from external equipment and configured to transmit decrypted content to the external equipment; 20 a decryption unit configured to perform a decryption processing on the encrypted content to acquire the decrypted content; and a digital watermark information addition unit configured to add, to the content to be transmitted, information specifying an outflow route for the content to create a digital watermark. 25 (16) The decryption processing device according to (15), wherein the information to create the digital watermark includes at least information identifying a transmission source of the content, information identifying the external equipment, and information identifying an own device. 30 (17) A reception processing system including: 35 a reception device; and a decryption processing device, wherein the reception device includes a content reception unit configured to receive encrypted content, an interface unit configured to transmit the received 5 content to the decryption processing device and configured to receive decrypted content from the decryption processing device, and a content output unit configured to embed a digital watermark in the content received from the decryption processing device and output the content by 10 using information specifying an outflow route for the content to create a digital watermark which is added to the content, and wherein the decryption processing device includes an interface unit configured to receive the encrypted content from the reception device and configured to transmit the decrypted content to the reception 15 device, a decryption unit configured to perform a decryption processing on the encrypted content to acquire the decrypted content, and a digital watermark information addition unit configured to add the information to create the digital watermark to the content to be transmitted. 20 (18) A reception processing system including: a reception device; and a decryption processing device, wherein the reception device includes 25 a content reception unit configured to receive encrypted content, an interface unit configured to transmit the received content to the decryption processing device and configured to receive decrypted content from the decryption processing device, and a content output unit configured to output the received content, and 30 wherein the decryption processing device includes an interface unit configured to receive the encrypted content from 36 the reception device and transmit the decrypted content to the reception device, a decryption unit configured to perform a decryption processing on the encrypted content to acquire the decrypted content, and a digital watermark embedment unit configured to embed a digital watermark in the content to be transmitted, by using information 5 specifying an outflow route for the content to create a digital watermark. (19) An information processing device including: a content acquisition unit configured to acquire content; 10 a digital watermark information acquisition unit configured to acquire information specifying an outflow route for the content to create a digital watermark; and a content output unit configured to embed a digital watermark in the acquired content and output the content, by using the acquired information. 15 Reference Signs List [0117] 10, 10A content transmission and reception system 20 11 broadcast transmission equipment 12 content distribution server 13 DRM server 14 network 15 edge router 25 16, 16A reception device 17, 17A CAM module 18 smart card 101 broadcast interface 102 middleware 30 103 communication interface 104 application 37 105 common interface 106 CI+ module 107 demultiplexer 108 decoder 5 109 A/V player 110 digital watermark generator 201 common interface 202 CI+ module 203 CAS decryption 10 204 DRM client 205 digital watermark generator 206 I-frame detector 207 digital watermark information addition unit 208 communication interface 15 38 CLAIMS Claim 1 A reception device comprising: a content reception unit configured to receive content; a digital watermark information acquisition unit configured 5 to acquire information specifying an outflow route for the content to create a digital watermark; and a content output unit configured to embed a digital watermark in the received content by using the acquired information and configured to output the 10 content. Claim 2 The reception device according to claim 1, wherein the content reception unit receives the content from a digital broadcast system and/or a distribution server 15 on a network. Claim 3 The reception device according to claim 1, wherein the information to create a digital watermark includes at least information identifying a transmission source of 20 the content and information identifying an own device. Claim 4 The reception device according to claim 1, wherein when the information to be used to create a digital watermark is added to the received content, the digital 25 watermark information acquisition unit further acquires the information. Claim 5 A reception method comprising: a step of receiving content; 30 a step of acquiring information specifying an outflow route for the content to create a digital watermark; and 39 a step of embedding a digital watermark in the received content and outputting the content by using the acquired information. Claim 6 A program causing a computer 5 to function as: content reception means for receiving content; digital watermark information acquisition means for acquiring information specifying an outflow route for the content to create a digital watermark; and output means for embedding a digital watermark in the decrypted content 10 and outputting the content by using the acquired information. Claim 7 A reception device comprising: a content reception unit configured to receive encrypted content; 15 an interface unit configured to transmit the received content to external equipment and configured to receive decrypted content from the external equipment; and a content output unit configured to embed, by using information specifying an outflow route for the content to create a digital watermark, a digital watermark in 20 the content received from the external equipment and configured to output the content. Claim 8 The reception device according to claim 7, wherein the content output unit 25 uses the information to create the digital watermark which is added to the content received from the external equipment. Claim 9 The reception device according to claim 7, wherein when determining that a 30 digital watermark has already been embedded in the content received from the external equipment, the content output unit does not embed a digital watermark in 40 the content received from the external equipment. Claim 10 The reception device according to claim 9, wherein the interface unit further receives functional 5 information of the external equipment from the external equipment, and wherein the content output unit determines, based on the received functional information, whether or not the digital watermark has been embedded in the content received from the external equipment. 10 Claim 11 The reception device according to claim 7, wherein the information to create a digital watermark includes at least information identifying a transmission source of the content, information identifying 15 an own device, and information identifying the external equipment. Claim 12 A decryption processing device comprising: an interface unit configured to receive encrypted content from external 20 equipment and configured to transmit decrypted content to the external equipment; a decryption unit configured to perform a decryption processing on the encrypted content to acquire the decrypted content; and a digital watermark embedment unit configured to embed a digital watermark in the content to be transmitted by using information specifying an 25 outflow route for the content to create a digital watermark. Claim 13 The decryption processing unit according to claim 12, wherein the content includes video data for each inter-frame predictive 30 encoded frame, and wherein the digital watermark embedment unit embeds a digital watermark 41 in video data of an intra-frame. Claim 14 The decryption processing device according to claim 12, wherein the information to create a digital watermark 5 includes at least information identifying a transmission source of the content, information identifying the external equipment, and information identifying an own device. Claim 15 10 A decryption processing device comprising: an interface unit configured to receive encrypted content from external equipment and configured to transmit decrypted content to the external equipment; a decryption unit configured to perform a decryption processing on the encrypted content to acquire the decrypted content; and 15 a digital watermark information addition unit configured to add, to the content to be transmitted, information specifying an outflow route for the content to create a digital watermark. Claim 16 20 The decryption processing device according to claim 15, wherein the information to create the digital watermark includes at least information identifying a transmission source of the content, information identifying the external equipment, and information identifying an own device. 25 Claim 17 A reception processing system comprising: a reception device; and a decryption processing device, wherein the reception device includes 30 a content reception unit configured to receive encrypted content, an interface unit configured to transmit the received content to the 42 decryption processing device and configured to receive decrypted content from the decryption processing device, and a content output unit configured to embed a digital watermark in the content received from the decryption processing device and output the content by using information specifying an outflow route for the content 5 to create a digital watermark which is added to the content, and wherein the decryption processing device includes an interface unit configured to receive the encrypted content from the reception device and configured to transmit the decrypted content to the reception 10 device, a decryption unit configured to perform a decryption processing on the encrypted content to acquire the decrypted content, and a digital watermark information addition unit configured to add the information to create the digital watermark to the content to be transmitted. 15 Claim 18 A reception processing system comprising: a reception device; and a decryption processing device, 20 wherein the reception device includes a content reception unit configured to receive encrypted content, an interface unit configured to transmit the received content to the decryption processing device and configured to receive decrypted content from the decryption processing device, and 25 a content output unit configured to output the received content, and wherein the decryption processing device includes an interface unit configured to receive the encrypted content from the reception device and transmit the decrypted content to the reception device, a decryption unit configured to perform a decryption processing on 30 the encrypted content to acquire the decrypted content, and a digital watermark embedment unit configured to embed a digital 43 watermark in the content to be transmitted, by using information specifying an outflow route for the content to create a digital watermark. Claim 19 An information processing 5 device comprising: a content acquisition unit configured to acquire content; a digital watermark information acquisition unit configured to acquire information specifying an outflow route for the content to create a digital watermark; and 10 a content output unit configured to embed a digital watermark in the acquired content and output the content, by using the acquired information.