Systems and methods for controlling access to supplemental content integrated into existing content

摘要

Methods and systems to allow for selective access to supplemental content that is associated with more generally distributed original content. In an embodiment, supplemental content may be encrypted, then integrated with original content using a steganographic technique. The resulting aggregated content may then be made available to users. Users may then extract the encrypted supplemental content from the original content. Those users having the proper privilege level may be given a cryptographic key to allow decryption of the supplemental content. Those without the necessary privilege will not be given this decryption key, and will therefore be unable to access the supplemental content.

主权项

1. A method, comprising:
encrypting, by a computing device, supplemental content; generating, by the computing device, verification data on the basis of the encrypted supplemental content; and replacing, by the computing device, a subset of bits in original content with the encrypted supplemental content and the verification data, wherein the subset is determined according to a predefined pattern, producing aggregated content, wherein the verification data is an indicator that supplemental content is present in the aggregated content, and wherein an initial bit of the subset is a member of a byte or pixel of the original content uniquely selected as a starting byte or pixel for bit replacement.