Method and system for the secure distribution of compressed...

Details Method and system for the secure distribution of compressed... Method and system for the secure distribution of compressed...

2011-04-12

2011-04-12

Chai, Longbit (Department: 2431)

Cryptography

Communication system using cryptography

Data stream/substitution enciphering

C380S028000, C380S217000, C713S150000, C713S151000, C713S152000, C713S153000, C713S189000

Reexamination Certificate

active

07925012

ABSTRACT:
A process for the secure distribution of compressed digital texts formed by blocks of binary data stemming from digital transformations applied to an original text, and including two stages: a preparatory stage including modifying at least one binary data in one of the blocks according to at least one substitution operation including extraction of the binary data in a block and its replacement by a decoy, and a transmission stage of a modified compressed digital text in conformity with the format of the original text, constituted of blocks modified during the course of the preparatory stage, and by a separate path of the modified compressed digital text, of digital complementary information permitting reconstitution of the original compressed digital text on the equipment of the addressee from the modified compressed digital text and from the complementary information.

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Chung-Ping Wu et al., “Efficient Multimedia Encryption via Entropy Codec Design,” Proceedings of SPIE, vol. 4314, Jan. 22, 2001, pp. 131-132.

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