An Efficient and Practical Adaptor Signature Scheme Design
Yanjun Li, Xiangkai Peng, Jinlong Wu, Ke Wang, Yani Sun, Yanhui Mao · 2025
Adaptor signatures are cryptographic primitives that integrate digital signatures with cryptographic commitments. They are primarily used to achieve verifiability, extractability, and delayed disclosure within cryptographic protocols. This paper introduces a novel adaptor signature scheme designed to bolster the security and unforgeability of digital signatures in applications such as blockchain, while simultaneously addressing the challenges of computational complexity and security in the key generation, signature process, and adaptation algorithm present in existing adaptor signature schemes. By constructing a hard relation predicated on the discrete logarithm problem and incorporating key derivation functions and hash functions, the proposed scheme realizes a comprehensive signature process that includes signature generation, pre-signature verification, adaptation, and secret extraction. Experimental evaluations indicate that this scheme surpasses traditional schemes in terms of computational complexity and signature efficiency, rendering it suitable for high-security application environments such as blockchain, smart contracts, and decentralized identity management. The scheme's reliance on well-established cryptographic primitives and its modular design contribute to its high portability, allowing for easy integration into different blockchain platforms and programming languages, and the scheme addresses challenges related to scalability and throughput.