Method and system for using a non-inversible transform and dynam

Details Method and system for using a non-inversible transform and dynam Method and system for using a non-inversible transform and dynam

1997-05-19

2000-10-03

Cangialosi, Salvatore

Cryptography

Key management

Having particular key generator

380 28, H04K 100

Patent

active

061283878

ABSTRACT:
The present invention discloses a method and system to encrypt an object code using a non-inversible transform and dynamic keys in an encryption circuit and an decryption circuit. The encryption circuit operates to encrypt an object code to an encrypted code using a sequence of dynamic keys which possess non-inversible transform characteristics. Similarly, the decryption circuit operates to decrypt the encrypt code using a sequence of dynamic keys which possess non-inversible transform characteristics. The sequence of dynamic keys change in accordance to a timing index in which a different key is generated for a different timing cycle. In one embodiment, the decryption circuit contains a transform circuit U to transform the encrypted code back to the object code. In another embodiment, the transform circuit U is partitioned into a resident device and mobile device.

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