Secure wireless transmission

• US 8,761,397 B1
• Filed: 10/02/2012
• Issued: 06/24/2014
• Est. Priority Date: 03/12/2007
• Status: Expired due to Fees

• Current Assignee: Monterey Research, LLC (Vector Capital Corporation)
• Original Assignee: Cypress Semiconductor Corporation (Infineon Technologies AG)
• Inventors: Wright, David G.
• Primary Examiner(s): McNally, Michael S
• Application Number:
  US13/633,696
• Time in Patent Office: 630 Days
• Field of Search: 380/270
• US Class Current: 380/270
• CPC Class Codes: G05F 1/10 Regulating voltage or current G05F1/02 takes precedence; for electric railways B60M3/02
• CPC Class Codes: G05F 1/46 wherein the variable actually regulated by the final control device is dc G05F1/625 takes precedence
• CPC Class Codes: G06F 1/24 Resetting means
• CPC Class Codes: G06F 13/24 using interrupt G06F13/32 takes precedence
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H02M 1/08 Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• CPC Class Codes: H03L 5/02 of power
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

A method in accordance with one embodiment of the invention may include receiving a first encryption key. A second encryption key may be generated, and a first data packet containing the second encryption key may be generated and at least part of the first data packet encrypted using the first encryption key. A second data packet may be generated and at least part of the second data packet encrypted using the second encryption key.

Claims

1. A method of transmitting data from a remote node, the method comprising:

requesting a first encryption key by a remote node upon transition to a second state from a first state, said remote node comprising a wireless communication device;

receiving, from a local node, the first encryption key configured for encrypting data using a first encryption protocol;

generating a second encryption key;

generating a first data packet comprising the second encryption key;

encrypting at least part of the first data packet using the first encryption key;

transmitting the first data packet;

generating a second data packet;

encrypting at least part of the second data packet using the second encryption key; and

transmitting the second data packet.

2. The method of claim 1, wherein the first encryption key comprises a public key.

3. The method of claim 2, wherein the encrypting at least part of the first data packet comprises configuring at least part of the first data packet to be decrypted using a private key corresponding to the public key.

4. The method of claim 1, wherein the second encryption key comprises a shared secret key.

5. The method of claim 1, wherein the transmitting of the first and the second data packets comprises using a wireless communication link.

6. The method of claim 1, wherein the encrypting the at least part of the second data packet comprises one of a group, said group comprising:

using the AES encryption standard and using the DES encryption standard.

7. The method of claim 1, wherein said first state comprising one of a group, said group comprising a low power state and a sleep mode and said second state comprising a wake state.

8. The method of claim 1, wherein the transmitting of the second data packet is in response to receiving an acknowledgement data packet from the local node.

9. The method of claim 1, further comprising receiving a third data packet and decrypting the third data packet using the second encryption key.

10. A method of receiving data from a remote node, the method comprising:

receiving a request for a first encryption key from a remote node, said remote node transition to a second state from a first state, said remote node comprising a wireless communications device;

generating a first encryption key configured for encrypting data using a first encryption protocol;

transmitting, to a remote node, a first data packet comprising the first encryption key;

receiving, from the remote node, a second data packet comprising a second encryption key, wherein the second data packet is encrypted, at least in part, using the first encryption key;

decrypting the second data packet using an encryption key associated with the first encryption protocol;

receiving a third data packet; and

decrypting at least part of the third data packet using the second encryption key, wherein the second encryption key is used to decrypt data using a second encryption protocol.

11. The method of claim 10, wherein the first encryption key comprises a public key.

12. The method of claim 11, wherein the decrypting the second data packet comprises using a private key corresponding to the public key.

13. The method of claim 10, wherein the second encryption key comprises a shared secret key.

14. The method of claim 10, wherein the receiving of the second and the third data packets comprises using a wireless communication link.

15. The method of claim 10, wherein the decrypting the at least part of the third data packet comprises one of a group, said group comprising:

using the AES encryption standard and using the DES encryption standard.

16. The method of claim 10, wherein, said first state comprising one of a group, said group comprising a low power state and a sleep mode and said second state comprising a wake state.

17. The method of claim 10, further comprising transmitting an acknowledgement data packet, wherein the acknowledgement data packet is configured to enable the remote node to transmit the third data packet.

18. The method of claim 10, further comprising transmitting a fourth data packet encrypted using the second encryption key.

19. A secure data communications system comprising:

a first device configured to generate a first encryption key configured for encrypting data using a first encryption protocol and transmit the first encryption key, the first device receiving a request for the first encryption key from a second device upon transition to a second state from a first state, said second device comprising a wireless communication device;

the second device configured to receive the first encryption key transmitted by the first device; and

the second device further configured to generate a second encryption key associated with a second encryption protocol and transmit the second encryption key to the first device using a data packet encrypted using the first encryption key,

wherein the first encryption protocol is a public key cryptography protocol, and

the second encryption protocol is a shared secret encryption protocol.

20. The system of claim 19 wherein:

the second encryption protocol is selected from a group consisting of AES encryption standard, DES encryption standard and Triple-DES encryption standard.

21. The system of claim 19 wherein said first state comprising one of a group, said group comprising a low power state and a sleep mode and said second state comprises a wake state.