AB-DVS: Attribute-Based Designated Verifier Signature

Abstract

In the realm of secure communications and cryptographic protocols, Attribute-Based Designated Verifier Signatures (AB-DVS) offer a sophisticated mechanism to enhance privacy and control over digital signatures. This paper presents a novel AB-DVS scheme that combines the principles of attribute-based cryptography with designated verifier signatures to achieve robust security guarantees and privacy protection. In our scheme, a signer generates a signature on a message using a master secret key and a set of attributes, while the designated verifier is equipped with specific attribute keys that enable them to validate the signature. Crucially, the scheme ensures that the signed message does not disclose any private information about the attributes used, preserving the signer’s anonymity. The proposed scheme leverages bilinear pairings and hash functions to achieve efficiency and security. We provide a comprehensive security analysis demonstrating the scheme’s unforgeability under chosen message attacks and its ability to maintain attribute signer privacy. Our results indicate that the scheme is secure against adversaries attempting to extract attribute information or forge signatures, making it suitable for applications requiring stringent privacy and access control.