Jornal Internacional de Redes de Sensores e Comunicações de Dados

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.