Revocation for direct anonymous attestation
US8499149B2 · kind B2 · utility
23Cited by
6References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 19, 2009 |
| Grant date | Jul 30, 2013 |
| Priority date | — |
| Expiry date | Mar 15, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/42
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Direct Anonymous Attestation involves a Signer using a credential supplied by an Issuer to anonymously prove to a Verifier, on the basis of a public key of the Issuer, the Issuer's attestation to the Signer's membership of a particular group. To facilitate membership revocation, the Issuer updates the public key at intervals, and also effects a complementary updating to the Signer's credential unless the Signer has ceased to be a legitimate group member. A non-updated credential is inadequate to enable the Signer to prove its Issuer attested group membership to a Verifier on the basis of the updated Issuer public key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.