Device for compression and encryption, and device for...

Cryptography – Communication system using cryptography – Wireless communication

Reexamination Certificate

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C380S028000, C380S030000, C380S277000

Reexamination Certificate

active

07372963

ABSTRACT:
To reduce processing load or processing time required for compression and encryption of data. Data to be compressed, such as image data, is divided into specified block sizes by am image divider (10). A quantizer (12) references a quantization table (14) to quantize each of these blocks of data. The result of this quantization is entropy encoded by an entropy encoder (16) referencing a coding table (18) to acquire compressed data. An encryptor (20) encrypts the quantization table (14) and coding table (18) used in the quantization and encoding using a specified encryption method. A multiplexor (24) gathers together the encrypted data acquired as a result together with the compressed data in a specified format.

REFERENCES:
patent: 4700175 (1987-10-01), Bledsoe
patent: 6122379 (2000-09-01), Barbir
patent: 04294684 (1992-10-01), None
patent: A 6-125553 (1994-05-01), None
patent: A 2000-115551 (2000-04-01), None
patent: A 2002-190798 (2002-07-01), None
Mats Brorsson, Mikael Collin, “Compilation: Adaptive and Flexible Dictionary Code Compression for Embedded Applications”, Oct. 2006, Proceedings of the 2006 international conference on compliers, architecture, and synthesis for embedded systems CASES '06, pp. 113-124.
English Translation for JP 04294684 A has been submitted on Dec. 20, 2007, pp. 1-30.

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