US 12,294,731 B2 · Detection of video tampering

Abstract

Techniques are provided for generation of secure video and tamper detection of the secure video. A methodology implementing the techniques according to an embodiment includes selecting a subset of macroblocks from a video frame to be transmitted and calculating a low frequency metric on each of the selected macroblocks. The method also includes performing a hash calculation on the low frequency metrics to generate a frame signature, encrypting the frame signature (using a private key) to generate an encrypted watermark, and modifying pixels of each of the selected macroblocks to generate the secured video frame, the modifications based on bits of the encrypted watermark that are associated with the selected macroblock. The method further includes authenticating a received video frame by comparing a calculated frame signature to an authenticated frame signature, the authenticated frame signature decrypted (using a public key) from an extracted watermark of the received video frame.

Claims17

Dependent claims

An apparatus comprising

interface circuitry;
instructions;
and
at least one processor circuit to be programmed by the instructions to:
determine respective metrics for respective macroblocks of a video frame, the respective metrics based on averages of respective pixels of the respective macroblocks;
obtain a frame signature encoded in the video frame, the frame signature based on extracted bits of the respective metrics;
authenticate the video frame based on the frame signature;
and
obtain at least one of a device identifier, a time stamp or a frame count encoded in the video frame, the at least one of the device identifier, the time stamp or the frame count based on the extracted bits of the respective metrics.

6 more elements

Dependencies are inferred from the claim text.

Detection of video tampering

Life of this patent

Detection of video tampering

Life of this patent

Abstract

Claims17