Identification of a compromised content player

摘要

A system and method for identifying the player that leaked content encryption keys by loading a set of player keys into individual content players and determining the number of encryptions and the number of encryption keys to use in multiple encrypting critical content. The method produces copies of critical data content packets, each copy of which is separately encrypted using any one of a set of encryption keys that are related to one another through a mathematical algorithm. The related set of encryption keys and data describing key relationship and content player identity are transmitted to a previously determined license management agency. The transmitted encrypted content is written to a receiving device or file, or streamed to an individual player for non-synchronous playback. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.

主权项

1. A system for identifying a group of content players, comprising:
a programmed hardware processor configured to: determine a number of encryptions and related content encryption keys used to track and transmit these related content encryption keys into individual content players; produce a plurality of copies of selected critical data content packets, each copy of which is separately encrypted using any one of said previously determined encryptions and any of said related content encryption keys, where said related content encryption keys are sub-title keys; incrementally encrypt data content frames through the use of a plurality of said sub-title keys prior to transmission of encrypted content; transmit the related set of content encryption keys as device keys and data describing key relationship and content player identity to a previously determined license management agency, identify by the content encryption keys a non-authorized content player which leaked the content encryption keys when the content encryption keys are exposed, and creates and disseminates by the license management agency a plurality of Sequence keys related to said device keys; transmit the incrementally encrypted content to a plurality of individual players, each player of which receives content encrypted by an incrementally different set of content encryption keys from said set of related content encryption keys, where said incremental encryption is performed on frame headers of content identified as critical content; and where said processor writes the transmitted encrypted content to a receiving device or file, or streams the encrypted content to an individual player for non-synchronous playback.