Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2005-05-25
2009-08-25
Tran, Ellen (Department: 2436)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
Reexamination Certificate
active
07581107
ABSTRACT:
Methods and systems for anonymity revocation, enabling a trusted entity to identify a user computer within an anonymous system. A system comprises an attester computer providing attestation value cert from a security module public key and an identifying value. The user computer having a module providing the module public key and a security module attestation value, the user computer providing a user public key, a user attestation-signature value derived from the attestation value cert, and an encryption computable under use of a trusted-entity public key and a module-generated-identifier value, the module-generated-identifier value relating to the identifying value; a verification computer verifying validity of received user attestation-signature value and the encryption; and a trusted entity having a trusted entity secret key, wherein the trusted entity is able to derive the module-generated-identifier value from the encryption, the module-generated-identifier value being usable to identify the user computer with the security module.
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Alexanian Vazken
Buchenhorner Michael J.
International Business Machines - Corporation
Song Hee
Tran Ellen
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