Converter, encryption/decryption system, multi-stage...

Details Converter, encryption/decryption system, multi-stage... Converter, encryption/decryption system, multi-stage...

2002-08-29

2009-06-16

Moazzami, Nasser G (Department: 2436)

Cryptography

Key management

Having particular key generator

C380S200000, C380S255000

Reexamination Certificate

active

07548618

ABSTRACT:
A converter uses a predetermined parameter a. A generating unit accepts generated inputs x1, . . . , xn, and generates generated outputs, y1, . . . , yn, using recurrence formulas, y1=F1(x1, a) and yi+1=Fi+1(xi+1, yi) (1≦i≦n−1). A key accepting unit accepts key inputs, k1, . . . , kn, and gives them as generated inputs to said generating unit. A repetition controller gives the generated outputs as generated inputs to said generating unit, for an “m” (m≧0) number of times, and sets one of the generated outputs to be given at the end as a random number string, r1, . . . , rn. The data accepting unit accepts data inputs, d1, . . . , dn. The converting unit converts data using, ei=di⋆ri, and, outputs data outputs, e1, . . . , en. The converter can be used both for encrypting and decrypting data.

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