Controlled-content recoverable blinded certificates

Details Controlled-content recoverable blinded certificates Controlled-content recoverable blinded certificates

2005-03-22

2005-03-22

Darrow, Justin T. (Department: 2132)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Central trusted authority provides computer authentication

C713S180000, C380S030000, C380S044000

Reexamination Certificate

active

06871276

ABSTRACT:
In a cryptographic system, a certificate is used to provide information regarding a client device. The certificate is blindly signed by a certifying authority to preserve the anonymity of the client device. However, information is encoded into the signature so that a content server can readily verify security attributes of the client device and make decisions regarding the delivery of electronic content to the client device based on those security attributes.

REFERENCES:
patent: 4759063 (1988-07-01), Chaum
patent: 4949380 (1990-08-01), Chaum
patent: 5659616 (1997-08-01), Sudia
patent: 6052467 (2000-04-01), Brands
patent: 6108644 (2000-08-01), Goldschlag et al.
patent: 6212634 (2001-04-01), Geer et al.
S. Stubblebine, P. Syverson, and D. Goldschlag, “Unlinkable Serial Transactions: Protocols and Applications,” Nov. 1999, ACM Transactions on Information and System Security, vol. 2, No. 4, pp. 354-389.*
“Online Cash Checks,” David Chaum, 1998, pp. 288-293.

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