Patent ID: 8103004
Filing Date: 2012-01-24
Classification: G06F,H04L

Abstract:
1. A method for use in decrypting content, comprising: receiving a first content key at a first system for the decryption of a first track of encrypted content; encrypting the first content key according to a first instance key stored at the first system producing a first encrypted content key; communicating the first encrypted content key over an externally accessible communication link to a second system; generating the first instance key at the second system from both a master key and a first key generation indicator value, such that the first instance key is not communicated to the second system; wherein the generating the first instance key at the second system comprises: decrypting the first encrypted content key using the generated first instance key at the second system providing a first unencrypted content key; and decrypting the first track of encrypted content using the first unencrypted content key at the second system.