Secure compressed imaging

Details Secure compressed imaging Secure compressed imaging

1996-12-20

1999-05-25

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 4, 380 5, 380 9, 380 25, 380 29, 380 30, 380 49, H04L 900

Patent

active

059076194

ABSTRACT:
A secure method and apparatus for compressing and digitally signing compressed video data. The apparatus compresses video data and permits signing of the compressed video image in such a way that if only a portion of the video image is successfully transmitted, the digital signature corresponding to that portion can still be verified. An optimization scheme which allows the verification of portions of a successful digital transmission with using only one digital signature is also disclosed.

REFERENCES:
patent: 5499294 (1996-03-01), Friedman
patent: 5721788 (1998-02-01), Powell et al.

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