Patent ID: 8078876
Filing Date: 2011-12-13
Classification: H04L

Abstract:
1. A method at a verifier comprising: requesting verification that an anonymous hardware device is a trusted member device of a trusted membership group; authenticating a received verification from the anonymous hardware device according to published cryptographic information from the trusted membership group; and performing a first verification that the anonymous hardware device remains a trusted member device of the trusted membership group according to a private member key component of a private signature key of the anonymous hardware device; receiving a rogue key list specifying a plurality of revoked member keys; performing a second verification that the anonymous hardware device remains a trusted member device of the trusted membership group according to the rogue key list of revoked member keys, wherein the second verification comprises a determination that the private member key component of a private signature key of the anonymous hardware device is cryptographically eliminated as a match to any one of the plurality of revoked member keys in the rogue key list via processing of each key in the revoked key list; and wherein the first verification and the second verification are performed without determining the private member key or any unique device identification information of the anonymous hardware device to enable a trusted member device to remain anonymous to the verifier.