Cryptography – Communication system using cryptography – Time segment interchange
Reexamination Certificate
2007-10-09
2007-10-09
Moazzami, Nasser (Department: 2136)
Cryptography
Communication system using cryptography
Time segment interchange
C380S028000
Reexamination Certificate
active
10161070
ABSTRACT:
A system and method for implementing the Triple Data Encryption Algorithm (TDEA) for the Data Encryption Standard (DES) using merger ciphers is provided which may be configured to operate in the chain block cipher (CBC) mode. Data blocks are enciphered using less computations in the critical timing path significantly reducing the time required for each round of ciphering. Two permutation function (Ef) elements (218, 220) operate separately during each ciphering round eliminating an XOR operation from the critical path.
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ITT Manufacturing Enterprises Inc.
Moazzami Nasser
Shiferaw Eleni A
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