Journal international des réseaux de capteurs et des communications de données

Using Malleable Signatures technique to Allow Multi Show Capability transform Brand's in Digital Credentials

Abstract

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.