Bit based arithmetic coding using variable size key cipher

Details Bit based arithmetic coding using variable size key cipher Bit based arithmetic coding using variable size key cipher

2005-06-30

2010-02-16

Henning, Matthew T (Department: 2431)

Cryptography

Communication system using cryptography

Having compression

C360S028000, C708S203000, C341S107000

Reexamination Certificate

active

07664267

ABSTRACT:
An encryption device and method and decryption device and method which implement a bit-based encryption scheme and hardware design. The encryption device includes a random number generator, receiving a main key, determining a working key using at least one random number and outputting a working key, a model, receiving the main key, the working key and plain text to be encoded and generating at least two frequency counts. The encryption device further includes an encoder, which outputs encoded text based on the working key, the plain text and the at least two frequency counts. The encryption device and method and decryption device and method process encrypted text that is based upon a stream structure with an unlimited key length and may be compressed by50%. The encoded text is changeable with different environments even for the same plain text and the same key. Operations of the hardware design are based on arithmetic additions and shifts, and not multiplications and divisions. As a result, the hardware design is simple and applicable to cryptography and e-commerce.

REFERENCES:
patent: 1310719 (1919-07-01), Vernam
patent: 4973961 (1990-11-01), Chamzas et al.
patent: 5025258 (1991-06-01), Duttweiler
patent: 5297207 (1994-03-01), Degele
patent: 5650783 (1997-07-01), Murashita et al.
patent: 6259388 (2001-07-01), Zhao
patent: 6301361 (2001-10-01), Mischenko et al.
Witten, I. H. and Cleary, J. G. 1988. On the privacy afforded by adaptive text compression. Comput. Secur. 7,4 (Aug. 1988), 397-408.
Witten, I. H., Neal, R. M., and Cleary, J. G. 1987. Arithmetic coding for data compression. Commun. ACM 30, 6 (Jun. 1987), 520-540.
Bergen, H. A. and Hogan, J. M. 1992. Data security in a fixed-model arithmetic coding compression algorithm. Comput. Secur. 11, 5 (Sep. 1992), 445-461.

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