METHOD AND SYSTEM FOR METADATA PROTECTION IN TV-ANYTIME

摘要

This invention concerns a method, system, device, and signal for the protection of the integrity of TV anytime metadata, and a signal carrying such protected information accordingly. Protection is obtained by applying a signature and certification approach. Optionally, an additional step of cannolization or a transform function is used. Data fragments can be labeled with a unique identifier so they can be referenced and separately signed individually or as a set by several different parties.