Patent ID: 8887258

Claim:
A method of binding a removable module to an access terminal, comprising: initializing the removable module at the access terminal; prior to receiving a command from the removable module, determining that a secret key is available for acquisition from the removable module; acquiring the secret key from the removable module responsive to the secret key being available from the removable module; storing the secret key in a memory of the access terminal as a terminal key; deactivating the secret key in the removable module such that the secret key is rendered inaccessible; receiving the command from the removable module to perform an authentication operation, wherein the command is a standard message having a command qualifier that represents an authentication challenge; obtaining a random value from the removable module in response to the command; calculating a response based on the random value and the terminal key stored in the memory of the access terminal; and transmitting the response to the removable module.