Message encryption using a hash function

Details Message encryption using a hash function Message encryption using a hash function

1993-07-01

1996-01-09

Barron, Jr., Gilberto

Cryptography

Communication system using cryptography

Data stream/substitution enciphering

380 44, H04L 920, H04L 922

Patent

active

054835984

ABSTRACT:
An encryption system employing a one-time key-pad uses a shared secret number and a one-way hash function with which both the originator and recipient of a message generate successive segments of a key-pad to encrypt and decrypt the message respectively. In one arrangement each key-pad segment is generated by applying the hash function to a combination of the secret number and the previous key-pad segment. In the other embodiment of the invention, each key-pad section is generated by applying the one-way hash function to a combination of the secret number and a corresponding segment of the ciphertext version of the message.

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