Patent ID: 8619993
Filing Date: 2013-12-31
Classification: H04L,H04W

Abstract:
1. A method, comprising: decrypting a content item to produce decrypted content; generating, at a computing device, a random number; generating a content encryption key request message including the random number and a service encryption key identifier; transmitting the content encryption key request message from the computing device to a smartcard coupled to a processor of the computing device to cause the smartcard to respond with a content encryption key that is generated with a key derivation function having as parameters an identification of a subscriber, a service encryption key identified with the service encryption key identifier and the random number, wherein the key derivation function is usable in general bootstrapping architecture, and wherein the identification of the subscriber includes an international mobile subscriber identity assigned to the subscriber; receiving a content encryption key response message from the smartcard coupled to the processor of the computing device, the content encryption key response message including the random number and the content encryption key; and encrypting the decrypted content using the content encryption key.