Cipher mixer with random number generator
Abstract
An encryption device has a random number generator whose output is
combined by exclusive-or with plaintext input which has been encrypted
by a first block cipher. The combined exclusive-or output is encrypted
with a second block cipher mechanism which produces a second enciphered
output. The output of the random number generator is also encrypted by a
third block cipher mechanism which produces a third enciphered output.
The first and second block cipher mechanisms differ from each other.
United States Patent
6,351,539
February 26, 2002
