DEVICE AND METHOD FOR PROVIDING VIDEO STREAM HAVING INTEGRITY

摘要

PROBLEM TO BE SOLVED: To provide a device and method for providing a video stream, where the hash value of a frame is included in the header of a video stream, and authentication information regarding the header is inserted into the video stream, thus ensuring integrity with respect to forgery of the video stream.

SOLUTION: The device includes a base frame encoding unit which encodes a base frame; an enhancement frame encoding unit which encodes an enhancement frame; a frame encryption unit which encrypts the encoded base frame and the encoded enhancement frame; a hash processing unit which calculates hash values for the encrypted base frame and the encrypted enhancement frame and hash values, contained included in headers of previous and subsequent video streams; a header management unit which includes information regarding the encoded base frame and the encoded enhancement frame and the calculated hash values in a header, and manages the header; and an authentication information creation unit which creates authentication information with respect to the header.

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