Method and apparatus for implementing multi-vendor rolling code keyless entry systems

1. A method for selectively programming a radio frequency (“RF”) remote access device comprising a processor, a first memory, and a second memory, the method comprising:

receiving a user input via a set of user inputs on the remote access device, the user input identifying an identifier associated with a vehicle make and model;

translating, by the remote access device, the identifier to a set of memory addresses for the first memory;

reading, by the remote access device, data at each memory address in the first memory from the set of memory addresses;

assembling, by the remote access device, the data read from the set of memory addresses from the first memory into a set of unsorted encrypted blocks;

decrypting, by the remote access device, the set of unsorted encrypted blocks using a protected encryption key to generate a set of decrypted configuration information; and

writing the set of decrypted configuration information to the second memory.

2. The method of claim 1 , wherein the method further comprises:

receiving an unprocessed set of configuration information;

processing the unprocessed set of configuration information into a set of plaintext blocks;

encrypting the set of plaintext blocks using the protected encryption key;

assembling the encrypted set of plaintext blocks into a set of unsorted sub-blocks;

obfuscating a set of storage locations in the first memory for the set of unsorted sub-blocks; and

storing the set of unsorted sub-blocks in the first memory at the set of obfuscated storage locations.

3. The method of claim 1 , wherein the set of memory addresses are derived at least in part by applying a pseudorandom sequence algorithm to a set of obfuscated memory addresses.

4. The method of claim 1 , wherein the data at each memory address in the first memory from the set of memory addresses comprises a sub-block of a set of configuration information.

5. The method of claim 1 , wherein the set of unsorted encrypted blocks represent a set of encrypted configuration information for the remote access device.

6. The method of claim 1 , wherein the set of decrypted configuration information is in an unsorted state.

7. The method of claim 6 , wherein the method further comprises sorting, by the remote access device, the set of decrypted configuration information into a sorted set of configuration information.

8. The method of claim 7 , wherein the sorted set of configuration information comprises a set of configuration information for controlling operation of the remote access device.

9. The method of claim 8 , wherein the method further comprises writing the sorted set of configuration information to the second memory.

10. The method of claim 1 , wherein the second memory is an active configuration memory adapted to determine operation of the remote access device.

11. The method of claim 1 , wherein the set of decrypted configuration information comprises a set of vendor specific properties.

12. The method of claim 1 , wherein method further comprises:

generating an RF signal based on the set of decrypted configuration information in the active configuration memory; and

transmitting the RF signal to an external device to cause the external device to perform a predefined operation.

13. The method of claim 12 , wherein the generated RF signal comprises a rolling code packet payload.

14. The method of claim 1 , wherein the method further comprises reading, by the remote access device, the protected encryption key associated with the set of unsorted encrypted blocks.

15. A selectively programmable radio frequency (“RF”) remote access device comprising:

a processor;

a first memory;

a second memory; and

a set of user inputs;

the remote access device comprising a set of code when executed by the processor configured to:

receive a user input via the set of user inputs on the remote access device, the user input identifying an identifier associated with a vehicle make and model;

translate the identifier to a set of memory addresses for the first memory;

read data at each memory address in the first memory from the set of memory addresses;

assemble the data read from the set of memory addresses from the first memory into a set of unsorted encrypted blocks;

decrypt the set of unsorted encrypted blocks using a protected encryption key to generate a set of decrypted configuration information; and

write the set of decrypted configuration information to the second memory.

16. The remote access device of claim 15 , wherein the set of code when executed by the processor is further configured to:

receive an unprocessed set of configuration information;

process the unprocessed set of configuration information into a set of plaintext blocks;

encrypt the set of plaintext blocks using the protected encryption key;

assemble the encrypted set of plaintext blocks into a set of unsorted sub-blocks;

obfuscate a set of storage locations in the first memory for the set of unsorted sub-blocks; and

store the set of unsorted sub-blocks in the first memory at the set of obfuscated storage locations.

17. The remote access device of claim 15 , wherein the set of memory addresses are derived at least in part by applying a pseudorandom sequence algorithm to a set of obfuscated memory addresses.

18. The remote access device of claim 15 , further comprising:

wherein the data at each memory address in the first memory from the set of memory addresses comprises a sub-block of a set of configuration information; and

wherein the set of unsorted encrypted blocks represent a set of encrypted configuration information for the remote access device.

19. The remote access device of claim 15 , wherein the set of code when executed by the processor is further configured to:

sort the set of decrypted configuration information into a sorted set of configuration information, wherein the sorted set of configuration information comprises a set of configuration information for controlling operation of the remote access device; and

write the sorted set of configuration information to the second memory, wherein the second memory is an active configuration memory adapted to determine operation of the remote access device.

20. The remote access device of claim 15 , wherein the set of code when executed by the processor is further configured to:

generate an RF signal based on the set of decrypted configuration information in the active configuration memory; and

transmit the RF signal to an external device to cause the external device to perform a predefined operation.