System and method for deriving an appropriate initialization vec

Details System and method for deriving an appropriate initialization vec System and method for deriving an appropriate initialization vec

1997-12-26

2000-04-25

Hayes, Gail O.

Cryptography

Communication system using cryptography

Symmetric key cryptography

H04L 900

Patent

active

060553162

ABSTRACT:
A secure communications arrangement is disclosed including a source device and a destination device interconnected by a network. The source device generates message packets for transfer to the destination device, each message packet including information in ciphertext form. The source device generates the ciphertext from plaintext in accordance with the cipher block chaining mode, using an initialization vector that is generated using a hash function selected so that small changes in an input result in large changes in the initialization vector. As a result values such as sequence numbers or time stamps can be used in generating the initialization vector, while still providing for cryptographic security for the ciphertext as against cryptanalytic attack. The destination device receives the message packet and decrypts the ciphertext to generate plaintext in accordance with the cipher block chaining mode, using an initialization vector that is generated using the corresponding hash function. Although the secure communications arrangement is described in connection with the cipher block chaining mode, other modes, such as the cipher-feedback mode, output-feedback mode and other encryption modes which make use of initialization vectors, could also be used.

REFERENCES:
patent: 4322576 (1982-03-01), Miller
patent: 5191610 (1993-03-01), Hill et al.
patent: 5201000 (1993-04-01), Matyas et al.
patent: 5420928 (1995-05-01), Aiello et al.
patent: 5438622 (1995-08-01), Normile et al.
patent: 5454039 (1995-09-01), Coppersmith et al.
patent: 5479513 (1995-12-01), Protopopescu et al.
patent: 5541997 (1996-07-01), Pappas et al.
patent: 5664017 (1997-09-01), Gressel et al.
patent: 5732138 (1998-03-01), Noll et al.
patent: 5889796 (1999-03-01), Whaley

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