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Cryptographic System, Encryption Device, Re Encryption Key Generation Device, Re Encryption Device, And Cryptographic Program
Abstract: ~*rk*1 t~*rkrk1 trenc*rencAn encryption device (200) outputs a ciphertext (ct) including a ciphertext (c) in which one of pieces of attribute information (x v) is set and a ciphertext (c) in which one of pieces of attribute information (y z) is set. A decryption device (300) outputs a re encryption key (rk) including a decryption key (k) generated by converting a decryption key (k) in which the other of the pieces of attribute information (x v) is set using conversion information (W) a decryption key (k) in which the other of the pieces of attribute information (y z) is set and encryption conversion information (?) in which one of mutually corresponding pieces of attribute information (x v ) is set and the conversion information (W) is encrypted. A re encryption device (400) outputs a re ciphertext (rct) including a ciphertext (c) generated by setting one of pieces of additional information (H T) in the ciphertext (ct) and a decryption key (k) generated by setting the other of the pieces of additional information (H T) in the re encryption key (rk).
Notices, Deadlines & Correspondence
Patent Information
Applicants
MITSUBISHI ELECTRIC CORPORATION
Inventors
1. KAWAI Yutaka
2. TAKASHIMA Katsuyuki
Specification
SOFT COPY ATTACHED IN PDF
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | Power of Attorney [31-03-2016(online)].pdf | 2016-03-31 |
| 2 | Form 5 [31-03-2016(online)].pdf | 2016-03-31 |
| 3 | Form 3 [31-03-2016(online)].pdf | 2016-03-31 |
| 4 | Form 18 [31-03-2016(online)].pdf | 2016-03-31 |
| 5 | Form 1 [31-03-2016(online)].pdf | 2016-03-31 |
| 6 | Drawing [31-03-2016(online)].pdf | 2016-03-31 |
| 7 | Description(Complete) [31-03-2016(online)].pdf | 2016-03-31 |
| 8 | Other Document [28-04-2016(online)].pdf | 2016-04-28 |
| 9 | Marked Copy [28-04-2016(online)].pdf | 2016-04-28 |
| 10 | Form 13 [28-04-2016(online)].pdf | 2016-04-28 |
| 11 | Description(Complete) [28-04-2016(online)].pdf | 2016-04-28 |
| 12 | 201647011328.pdf | 2016-06-08 |
| 13 | Other Patent Document [13-07-2016(online)].pdf | 2016-07-13 |
| 14 | 201647011328-Form 1-270416.pdf | 2016-07-13 |
| 15 | 201647011328-Correspondence-F1-270416.pdf | 2016-07-13 |
| 16 | Form 3 [21-09-2016(online)].pdf | 2016-09-21 |
| 17 | 201647011328-FER.pdf | 2019-12-10 |
| 18 | 201647011328-OTHERS [08-06-2020(online)].pdf | 2020-06-08 |
| 19 | 201647011328-Information under section 8(2) [08-06-2020(online)].pdf | 2020-06-08 |
| 20 | 201647011328-FORM 3 [08-06-2020(online)].pdf | 2020-06-08 |
| 21 | 201647011328-FER_SER_REPLY [08-06-2020(online)].pdf | 2020-06-08 |
| 22 | 201647011328-DRAWING [08-06-2020(online)].pdf | 2020-06-08 |
| 23 | 201647011328-COMPLETE SPECIFICATION [08-06-2020(online)].pdf | 2020-06-08 |
| 24 | 201647011328-CLAIMS [08-06-2020(online)].pdf | 2020-06-08 |
| 25 | 201647011328-ABSTRACT [08-06-2020(online)].pdf | 2020-06-08 |
| 26 | 201647011328-FORM 3 [12-08-2021(online)].pdf | 2021-08-12 |
| 27 | Description(Complete) [31-03-2016(online)].pdf | 2016-03-31 |
| 27 | 201647011328-FORM 3 [21-09-2022(online)].pdf | 2022-09-21 |
| 28 | 201647011328-US(14)-HearingNotice-(HearingDate-05-10-2023).pdf | 2023-08-24 |
| 29 | 201647011328-REQUEST FOR ADJOURNMENT OF HEARING UNDER RULE 129A [29-09-2023(online)].pdf | 2023-09-29 |
| 30 | 201647011328-US(14)-ExtendedHearingNotice-(HearingDate-03-11-2023).pdf | 2023-10-04 |
| 31 | 201647011328-FORM-26 [03-11-2023(online)].pdf | 2023-11-03 |
| 32 | 201647011328-Correspondence to notify the Controller [03-11-2023(online)].pdf | 2023-11-03 |
| 32 | Form 5 [31-03-2016(online)].pdf | 2016-03-31 |
| 33 | 201647011328-Correspondence to notify the Controller [06-12-2023(online)].pdf | 2023-12-06 |
Search Strategy
| 1 | searchstrategy_13-11-2019.pdf |
| 2 | 2020-10-2012-38-07AE_20-10-2020.pdf |