Pipelined deciphering round keys generation

Details Pipelined deciphering round keys generation Pipelined deciphering round keys generation

2008-01-08

2008-01-08

Truong, T. B. (Department: 2135)

Cryptography

Communication system using cryptography

Time segment interchange

C380S042000, C380S044000

Reexamination Certificate

active

07317795

ABSTRACT:
An apparatus is equipped with a deciphering round key generator to successively generate in real time at least a first and a second deciphering round key based on a deciphering key, and a deciphering unit coupled to the deciphering round key generator to successively employ the real time successively generated deciphering round keys to incrementally decipher a ciphered text. The deciphering round key generator at least generates the second deciphering round key in real time while the deciphering unit deciphers the ciphered text employing the real time generated first deciphering round key. At a result, deciphering round keys may be generated in a much more efficient manner on an as needed basis.

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