Detection of video tampering

At least one non-transitory machine-readable storage medium having instructions encoded thereon that, when executed by one or more processors, cause a process to be carried out for detection of video tampering, the process comprising:

• selecting a subset of macroblocks from a received video frame;
• calculating a low frequency metric on each of the selected macroblocks, the low frequency metric independent of video compression;
• performing a hash calculation on the low frequency metrics to generate a received frame signature;
• obtaining an encrypted watermark from extracted bits of the low frequency metrics;
• decrypting the encrypted watermark to generate a decrypted watermark, the decryption employing a public key;
• extracting an authenticated frame signature from the decrypted watermark;
• and
• comparing the authenticated frame signature to the received frame signature to detect tampering of the received video frame.

A system for generation of secure video, the system comprising:

• a macroblock selector circuit to select a subset of macroblocks from a video frame to be transmitted;
• a frame signature generation circuit to generate a frame signature using frame data that is independent of video compression;
• a hash value calculation circuit to perform a hash calculation on the low frequency metrics to generate a frame signature;
• an encryption circuit to encrypt the frame signature to generate an encrypted watermark, the encryption employing a private key;
• and
• a macroblock pixel manipulation circuit to modify one or more pixels of each of the selected macroblocks based on bits of the encrypted watermark that are associated with the selected macroblock, the modification to generate a secured video frame.