Apparatus and method for enhanced revocation of direct proof and direct anonymous attestation
US7844614B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2007 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | Feb 11, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/56
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In some embodiments, a method and apparatus for enhanced revocation of direct proof and direct anonymous attestation are described. In one embodiment a trusted hardware device verifies that membership of the device within a trusted membership group is not revoked according to a revocation list received with a challenge request from a verifier. Once such verification is performed, the device convinces the verifier of possessing cryptographic information without revealing unique, device identification information of the trusted hardware device or the cryptographic information. In one embodiment, the trusted hardware device computes a digital signature on a message received with the challenge request to the verifier if membership of the anonymous hardware device within a trusted membership group is verified. In one embodiment, the verifier authenticates the digital signature according to a public key of the trusted membership group to enable a trusted member device to remain anonymous to the verifier. Other embodiments are described and claimed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.