Anonymous User Revocation for Using Attribute-Based Signature in Cloud Computing

Cloud computing provides elastic, on-demand, self-provisioning computing resources to users. Highly dynamic and heterogeneous environments present significant challenges to access control. Attribute-based signature (ABS) enables fine grained access control over an expressive access policy (predicate). However, user revocation, especially anonymous user revocation, is not straightforward to provide for existing ABS schemes. In this paper we propose an anonymous revocation feature for an ABS scheme that is practical to deploy in a cloud environment.