Patent ID: 7623657
Filing Date: 2009-11-24
Classification: H04L

Abstract:
1. A method of processing content for delivery in an information system, wherein the content is representable as access units, the method comprising the steps of: obtaining a set of alternate versions of an access unit for a current time slot associated with the content; and assigning, by a processor of the information system, an encryption index to each access unit in the set of alternate versions of the access unit in the current time slot such that an encryption index increases over time; wherein the assigning step further comprises the steps of: computing, by the processor of the information system, measures in accordance with an encryption index of each access unit from a set of alternate versions of an access unit of a previous time slot; and setting, by the processor of the information system, the encryption index of each access unit in the current time slot based at least in part on the maximum of the computed measures.