Patent ID: 9363482
Filing Date: 2016-06-07
CPC Classification: H04N

Claim Text:
1. Method to enforce watermarking instructions by a security module in a receiving device, said receiving device further comprising a descrambling module for descrambling scrambled audio/video data with at least a content key, and a watermarking module to embed a watermark into the descrambled audio/video data based on a watermarking data, said method comprising: receiving a security message by the security module, comprising at least the content key, watermark instructions and security message signature, the security message signature being a signature of the watermark instructions and the content key based on an authentication key, said watermark instructions indicating whether to activate or deactivate the watermarking module, decrypting the security message with a transmission key, and verifying the security message signature with the authentication key, and in case of successful verification,