Extended key generator, encryption/decryption unit, extended...

Details Extended key generator, encryption/decryption unit, extended... Extended key generator, encryption/decryption unit, extended...

2005-05-10

2005-05-10

Morse, Gregory (Department: 2134)

Cryptography

Key management

Having particular key generator

C380S029000, C380S037000

Reexamination Certificate

active

06891950

ABSTRACT:
There are disclosed an extended key generator, encryption/decryption unit, and storage medium, in which as each of key transform functions, a transform process is done by an S box (substitution table) on the basis of a first key obtained from the inputted key, and an adder computes a corresponding one of extended keys on the basis of a value obtained by shifting the transformed result of the S box to the left, and a second key obtained from the inputted key.

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