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Patent applications and USPTO patent grants for Feistel; Horst.The latest application filed is for "variant key matrix cipher system".
Patent | Date |
---|---|
Variant key matrix cipher system Grant RE30,957 - Feistel June 1, 1 | 1982-06-01 |
High security system for electronic signature verification Grant 4,326,098 - Bouricius , et al. April 20, 1 | 1982-04-20 |
Stream/block cipher crytographic system Grant 4,316,055 - Feistel February 16, 1 | 1982-02-16 |
Variant key matrix cipher system Grant 4,195,196 - Feistel March 25, 1 | 1980-03-25 |
Key controlled block-cipher cryptographic system employing a multidirectional shift matrix Grant 4,195,200 - Feistel March 25, 1 | 1980-03-25 |
Centralized Verification System Grant 3,798,605 - Feistel March 19, 1 | 1974-03-19 |
Block Cipher Cryptographic System Grant 3,798,359 - Feistel March 19, 1 | 1974-03-19 |
Step Code Ciphering System Grant 3,798,360 - Feistel March 19, 1 | 1974-03-19 |
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