Patent ID: 8060914
Filing Date: 2011-11-15
Classification: G06F,H04L

Abstract:
1. A communication device for a user to access a service in a communication network, comprising: a root credential acquiring unit, being adapted to acquire one or more root credentials, each one of which is issued for a user right; a right selecting unit, being adapted to select a set of user rights; an anonymous selectable credential generating unit, being adapted to generate one or more anonymous selectable credentials from the root credentials that correspond to the selected set of user rights; a communication unit, being adapted to transmit the anonymous selectable credentials; and a knowledge proving unit, being adapted to perform knowledge proof to anonymously prove via any one of the anonymous selectable credentials that the set of user rights was authorized, wherein the anonymous selectable credential generating unit generates an anonymous selectable credential T corresponding to a selected set of user rights {r  where t