Embedded revocation messaging

Abstract

An apparatus stores (60), transmits (1, 1′), or receives (2) a signal (5, 5′) representing user desired content (10, 10′, 10″, 10′″, 62) with device revocation information (4, 71) embedded in the user desired content. In a suitable transmitting embodiment (1, 1′), watermark content (20) including the device revocation information (4) is embedded in the user desired content (10, 10′, 10″, 10′″) during encoding as an embedded watermark In a suitable receiving embodiment (2), an embedded watermark (20) is read from the signal (5) representing the user desired content (10). The device revocation information (4) is extracted from the embedded watermark (20).

Dependencies are inferred from the claim text.