Jinnan Fan and Carlisle Adams
In this paper we propose the use of a malleable signature technique to transform Brands’ digital credentials from single-show capability to multi-show capability. Our specific proposed instantiation uses RSA digital signatures so that Alice can efficiently transform an original credential and its corresponding CA signature to a randomized / blinded version of the credential and signature that can be shown to a verifier without risk of traceability (by the CA or across multiple verifiers). We describe our modified issuing and showing protocols and discuss the security properties of our proposed scheme.
PDFShare this article
