Patent ID: 7477743

Claim:
A method, comprising: receiving a request for a service from a requestor over a bi-directional channel; authenticating the requestor; transmitting first decryption information to the requestor over the bi-directional channel, wherein the first decryption information decrypts the service; transmitting the service, encrypted with encryption information corresponding to the first decryption information, over a unidirectional channel; generating second decryption information for use in decrypting the service; encrypting the second decryption information with the encryption information corresponding to the first decryption information; transmitting the second decryption information, encrypted with the encryption information corresponding to the first decryption information, over the unidirectional channel, wherein the second decryption information decrypts the service; and transmitting the service, encrypted with encryption information corresponding to the second decryption information rather than with encryption information corresponding to the first decryption information, over the unidirectional channel.