Cryptography – Communication system using cryptography – Time segment interchange
Patent
1993-09-20
1995-01-10
Cangialosi, Salvatore
Cryptography
Communication system using cryptography
Time segment interchange
380 47, 380 49, 380 50, H04L 916
Patent
active
053814800
ABSTRACT:
A system translates a first group of cipher blocks based on a first encryption key to a second group of respective cipher blocks based on a second encryption key. Respective cipher blocks of the first and second groups represent the same data. The system comprises decryption hardware for sequentially decrypting the cipher blocks of the first group based on the first key. Encryption hardware is coupled to receive decrypted blocks output from the decryption hardware and sequentially encrypts the decrypted blocks into respective cipher blocks of the second group based on the second encryption key. A control unit controls the encryption hardware to encrypt the decrypted blocks into the respective cipher blocks of the second group while the decryption hardware decrypts cipher blocks of the first group. Consequently, decryption and encryption operations occur in parallel and the translation process is expedited.
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Butter Adrian S.
Finkel Brian S.
Kao Chang-Yung
Kodukula Sivarama K.
Kuruts James P.
Cangialosi Salvatore
International Business Machines - Corporation
Samodovitz Arthur J.
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