1. A Power Receiving Unit (PRU) for wireless power transfer to a device, said
PRU comprising:
a receive resonator module to receive power from a Power Transmitting Unit (PTU) over an inductive resonant coupling link, said power provided for said wireless power transfer, wherein said power is further modulated to provide a first type of signaling between said PRU and said PTU over said resonant coupling link;
a signaling link communication module to provide a second type of signaling between said PRU and said PTU over a wireless communication link; and
a controller module to:
receive a random number, generated by said PTU, over said resonant coupling link;
calculate an encoded response based on said random number and on an identifier associated with said PRU (PRUID); and
transmit said encoded response to said PTU over said wireless communication link, for verification by said PTU.
2. The PRU of claim 1, wherein said controller module is further to receive an acknowledgement from said PTU of said verification and that said random number is a shared secret for encryption of further communications over said wireless communication link.
3. The PRU of claims 1 or 2, wherein said first type of signaling over said resonant coupling link conforms to an Alliance for Wireless Power (A4WP) system standard and said random number is received in a power beacon of said first type of signaling.
4. The PRU of any of claims 1 to 3, wherein said second type of signaling over said wireless communication link conforms to a Bluetooth® Low Energy (BLE) system standard and said encoded response is transmitted in a BLE advertisement packet.

5. The PRU of any of claims 1 to 4, wherein said encoded response is calculated
based on a hash algorithm and/or encryption function.
6. The PRU of any of claims 1 to 5, wherein said controller module is further to:
receive a second random number, generated by said PTU, over said wireless
communication link;
calculate a second encoded response based on said random number and on said second random number; and
transmit said second encoded response to said PTU over said wireless communication link, for further verification by said PTU.
7. The PRU of any of claims 1 to 6, wherein said controller module is further to:
generate a second random number for transmission to said PTU over said
resonant coupling link, wherein said PTU calculates a second encoded response based on said second random number and on an identifier associated with said PTU (PTUJD);
receive said second encoded response and said PTU_ID from said PTU over said wireless communication link;
calculate a third encoded response based on said second random number and said received PTU_ID; and
verify that said received second encoded response matches said calculated third encoded response.
8. The PRU of any of claims 1 to 7, wherein said device is a smart phone, smart tablet, notebook or laptop computer.
9. A Power Transmitting Unit (PTU) to provide wireless power transfer through a Power Receiving Unit (PRU) of a device, said PTU comprising:
a transmit resonator module to transmit power to said PRU over an inductive resonant coupling link, said power provided for said wireless power transfer, wherein said power is further modulated to provide a first type of signaling between said PTU and said PRU over said resonant coupling link;
a signaling link communication module to provide a second type of signaling between said PTU and said PRU over a wireless communication link; and

a controller module to:
generate a random number for transmission to said PRU over said resonant coupling link, wherein said PRU calculates an encoded response based on said random number and on an identifier associated with said PRU (PRUID);
receive said encoded response and said PRUID from said PRU over said wireless communication link;
calculate a second encoded response based on said random number and said received PRU_ID; and
verify that said received encoded response matches said calculated second encoded response.
10. The PTU of claim 9, wherein said controller module, in response to said verification of said match, is further to transmit an acknowledgement to said PRU to indicate that said random number is a shared secret for encryption of further communications over said wireless communication link.
11. The PTU of claims 9 or 10, wherein said controller module, in response to a failure of said verification of said match, is further to record a status of said PRU as distant.
12. The PTU of any of claims 9 to li, wherein said first type of signaling over said resonant coupling link conforms to an Alliance for Wireless Power (A4WP) system standard and said random number is received in a power beacon of said first type of signaling.
13. The PTU of any of claims 9 to 12, wherein said second type of signaling over said wireless communication link conforms to a Bluetooth® Low Energy (BLE) system standard and said encoded response is transmitted in a BLE advertisement packet.
14. The PTU of any of claims 9 to 13, wherein said encoded response is calculated based on a hash algorithm and/or encryption function.
15. The PTU of any of claims 9 to 14, wherein said controller module is further to:

generate a second random number for transmission to said PRU over said wireless communication link, wherein said PRU calculates a second encoded response based on said random number and said second random number;
receive said second encoded response from said PRU over said wireless communication link;
calculate a third encoded response based on said random number and said second random number; and
verify that said received second encoded response matches said calculated third encoded response.
16. The PTU of any of claims 9 to 15, wherein said controller module is further to:
receive a second random number from said PRU over said resonant coupling
link;
calculate a second encoded response based on said second random number and on an identifier associated with said PTU (PTUID); and
transmit said second encoded response and said PTUID to said PRU over said wireless communication link, for verification by said PRU.
17. A method for improving security of a Power Receiving Unit (PRU) for
wireless power transfer to a device, said method comprising:
receiving power, for said wireless power transfer, from a Power Transmitting Unit (PTU) over an inductive resonant coupling link, wherein said power is modulated to provide a first type of signaling between said PRU and said PTU over said resonant coupling link;
establishing a second type of signaling between said PRU and said PTU over a wireless communication link;
receiving a random number, generated by said PTU, over said resonant coupling link;
calculating an encoded response based on said random number and on an identifier associated with said PRU (PRUID); and
transmitting said encoded response to said PTU over said wireless communication link, for verification by said PTU.
18. The method of claim 17, further comprising:

receiving an acknowledgement from said PTU of said verification; and
in response to said received verification, employing said random number as a
shared secret for encryption of further communications over said wireless
communication link.
19. The method of claims 17 or 18, wherein said first type of signaling over said resonant coupling link conforms to an Alliance for Wireless Power (A4WP) system standard and said random number is received in a power beacon of said first type of signaling.
20. The method of any of claims 17 to 19, wherein said second type of signaling over said wireless communication link conforms to a Bluetooth® Low Energy (BLE) system standard and said encoded response is transmitted in a BLE advertisement packet.
21. The method of any of claims 17 to 20, further comprising calculating said encoded response based on a hash algorithm and/or encryption function.
22. The method of any of claims 17 to 21, further comprising:
receiving a second random number, generated by said PTU, over said wireless communication link;
calculating a second encoded response based on said random number and on said second random number; and
transmitting said second encoded response to said PTU over said wireless communication link, for further verification by said PTU.
23. The method of any of claims 17 to 22, further comprising:
generating a second random number for transmission to said PTU over said resonant coupling link, wherein said PTU calculates a second encoded response based on said second random number and on an identifier associated with said PTU (PTUJD);
receiving said second encoded response and said PTU_ID from said PTU over said wireless communication link;

calculating a third encoded response based on said second random number and said received PTU_ID; and
verifying that said received second encoded response matches said calculated third encoded response.
24. At least one computer-readable storage medium having instructions stored
thereon which when executed by a processor result in the following operations for
improving security of a Power Receiving Unit (PRU) for wireless power transfer to a
device, said operations comprising:
receiving power, for said wireless power transfer, from a Power Transmitting Unit (PTU) over an inductive resonant coupling link, wherein said power is modulated to provide a first type of signaling between said PRU and said PTU over said resonant coupling link;
establishing a second type of signaling between said PRU and said PTU over a wireless communication link;
receiving a random number, generated by said PTU, over said resonant coupling link;
calculating an encoded response based on said random number and on an identifier associated with said PRU (PRUID); and
transmitting said encoded response to said PTU over said wireless communication link, for verification by said PTU.
25. The computer-readable storage medium of claim 24, further comprising the
operations of:
receiving an acknowledgement from said PTU of said verification; and
in response to said received verification, employing said random number as a
shared secret for encryption of further communications over said wireless
communication link.
26. The computer-readable storage medium of claims 24 or 25, further comprising
the operation of calculating said encoded response based on a hash algorithm and/or
encryption function.

27. The computer-readable storage medium of any of claims 24 to 26, further
comprising the operations of:
receiving a second random number, generated by said PTU, over said wireless communication link;
calculating a second encoded response based on said random number and on said second random number; and
transmitting said second encoded response to said PTU over said wireless communication link, for further verification by said PTU.
28. The computer-readable storage medium of any of claims 24 to 27, further
comprising the operations of:
generating a second random number for transmission to said PTU over said resonant coupling link, wherein said PTU calculates a second encoded response based on said second random number and on an identifier associated with said PTU (PTUJD);
receiving said second encoded response and said PTUID from said PTU over said wireless communication link;
calculating a third encoded response based on said second random number and said received PTUID; and
verifying that said received second encoded response matches said calculated third encoded response.