Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1996-07-16
1997-08-19
Cain, David C.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 25, 380 30, H04K 100
Patent
active
056596162
ABSTRACT:
A system for securely using digital signatures in a commercial cryptographic system that allows industry-wide security policy and authorization information to be encoded into the signatures and certificates by employing attribute certificates to enforce policy and authorization requirements. In addition to value limits, cosignature requirements and document type restrictions that can be placed on transactions, an organization can enforce with respect to any transaction geographical and temporal controls, age-of-signature limitations, preapproved counterparty limitations and confirm-to requirements by using attribute certificates for the transacting user. Restrictions on distribution of certificates can be set using attribute certificates. Certificates can be used also to ensure key confinement and non-decryption requirements of smartcards in this system.
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Cain David C.
Certco, LLC
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