Cryptography – Communication system using cryptography – Data stream/substitution enciphering
Reexamination Certificate
2007-10-02
2007-10-02
Barron, Jr., Gilberto (Department: 2131)
Cryptography
Communication system using cryptography
Data stream/substitution enciphering
C380S262000, C380S265000, C380S268000, C713S194000
Reexamination Certificate
active
09712505
ABSTRACT:
A stream cipher cryptosystem includes a keystream generator receiving a key and providing a keystream. A cryptographic combiner combines a first binary data sequence and the keystream with two non-associative operations to provide a second binary data sequence. In encryption operations, the cryptographic combiner is an encryption combiner and the first binary data sequence is a plaintext binary data sequence and the second binary data sequence is a ciphertext binary data sequence. In decryption operations, the cryptographic combiner is a decryption combiner and the first binary data sequence is a ciphertext binary data sequence and the second binary data sequence is a plaintext binary data sequence.
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Barron Jr. Gilberto
Fredrick Kris T.
Honeywell International , Inc.
Jackson Jenise
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