Method and apparatus for data encryption

Details Method and apparatus for data encryption Method and apparatus for data encryption

2006-08-03

2009-11-03

Brown, Christopher J (Department: 2439)

Cryptography

Key management

Having particular key generator

C380S028000

Reexamination Certificate

active

07613297

ABSTRACT:
A method and apparatus for use in encrypting and decrypting digital communications converting an initial block to final block based on freely selectable control information and secret key information having double the length of prior art keys and maintaining compatibility with the prior art encryption system.

REFERENCES:
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patent: 5214703 (1993-05-01), Massey et al.
patent: 5835603 (1998-11-01), Coutts et al.
patent: 6061449 (2000-05-01), Candelore et al.
patent: 6108421 (2000-08-01), Kurdziel et al.
patent: 6424713 (2002-07-01), Sprunk
patent: 2002/0018562 (2002-02-01), Lim

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