Patent ID: 7818067

Claim:
A system comprising: an implantable device including: a first far field transceiver; a first processor coupled to the first far field transceiver; and a first memory coupled to the first processor; and an electrical circuit coupled to the processor; and an external device including: a second far field transceiver; a second processor coupled to the second far field transceiver; a second memory coupled to the second processor; and a data port coupled to the processor; and wherein at least one of any combination of the first processor and second processor is adapted to execute instructions to implement an encryption algorithm configured to generate a ciphertext for communication between the implantable device and the external device based on a code generated by the first processor, a key stored in the first memory and the second memory, and a message; and wherein at least one of any combination of the first processor and second processor is adapted to execute instructions to implement a decryption algorithm configured to decrypt the message from the ciphertext based on the code and the key.