Method and system for securing compressed digital video

Details Method and system for securing compressed digital video Method and system for securing compressed digital video

2007-11-13

2007-11-13

Moazzami, Nasser (Department: 2136)

Cryptography

Video cryptography

Video electric signal modification

C380S217000

Reexamination Certificate

active

10615898

ABSTRACT:
A method for producing and for subsequently decrypting a protected stream of compressed video content is described herein. The method includes receiving an input stream of compressed video content containing a sequence of frames. A set of encrypted frames are created by encrypting selected frames of the sequence of frames in accordance with a frame encryption function. The method further includes generating frame decryption information necessary to decrypt the set of encrypted frames. In a particular implementation the protected stream is assembled using the set of encrypted frames, unencrypted frames from the input stream, and the frame decryption information. The decryption process is initiated by receiving the protected stream of compressed video content and the corresponding frame decryption information. In this regard the frame decryption information includes data distinguishing the encrypted frames from the unencrypted frames of the compressed video content within the protected stream. The encrypted frames are then decrypted in accordance with the frame decryption information.

REFERENCES:
patent: 5805700 (1998-09-01), Nardone et al.
patent: 7151832 (2006-12-01), Fetkovich et al.
patent: 7151833 (2006-12-01), Candelore et al.
Author unknown, “Information Technology—Coding of Audio-Visual Objects—Part 2: Visual”, International Standard, ISO/IEC 14496-2, Third edition, Jun. 1, 2004, pp. 1-706.

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