Block cipher mode of operation for secure, length-preserving enc

Details Block cipher mode of operation for secure, length-preserving enc Block cipher mode of operation for secure, length-preserving enc

1995-02-06

1997-09-30

Cangialosi, Salvatore

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 37, H04L 908

Patent

active

056733194

ABSTRACT:
A method for encrypting a plaintext string into ciphertext begins by cipher block chaining (CBC) the plaintext using a first key and a null initialization vector to generate a CBC message authentication code (MAC) whose length is equal to the block length. The plaintext string is then cipher block chained again, now using a second key and the CBC-MAC as the initialization vector, to generate an enciphered string. The CBC-MAC and a prefix of the enciphered string comprising all of the enciphered string except the last block are then combined to create the ciphertext. The described mode of operation is length-preserving, yet has the property that related plaintexts give rise to unrelated ciphertexts.

REFERENCES:
patent: 3958081 (1976-05-01), Ehrsam et al.
patent: 4074066 (1978-02-01), Ehrsam et al.
patent: 4319070 (1982-03-01), Best
patent: 4322576 (1982-03-01), Miller
patent: 4751733 (1988-06-01), Delayaye et al.
patent: 4910776 (1990-03-01), Dyke
patent: 4982429 (1991-01-01), Takaragi et al.
patent: 5063596 (1991-11-01), Dyke
patent: 5068895 (1991-11-01), Shimada
patent: 5109413 (1992-04-01), Comerford et al.
patent: 5184125 (1993-02-01), Weng
patent: 5196840 (1993-03-01), Leigh et al.
patent: 5297208 (1994-03-01), Schlafly et al.
patent: 5319710 (1994-06-01), Atalla et al.
patent: 5491749 (1996-02-01), Rogaway et al.
patent: 5491750 (1996-02-01), Bellare et al.

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