Patent ID: 8904184

Claim:
A method, comprising: obtaining, by a media signal processor, a private key and a public key; for a first video frame of a media signal, wherein the media signal comprises a plurality of sequential video frames: creating, by the media signal processor, a first signature to sign the first video frame of the plurality of sequential video frames by combining the private key, the public key, and the first media content data of the first video frame to sign the first video frame; determining, by the media signal processor, a second signature to sign a second video frame of the plurality of sequential video frames by combining the private key, the public key, the first signature, and second media content data of the second video frame; and determining subsequent signatures for respective frames of the plurality of sequential video frames by combining the private key, previous signatures, and respective metadata comprising respective media content data of the respective video frame to sign the respective video frame, wherein the previous signatures comprise signatures of a predetermined number of previous video frames to preceding the respective video frame.