Adaptor signature based on randomized EdDSA in blockchain

• DOI: 10.1016/j.dcan.2024.06.004
• Publication Date: 2024-06-13T00:25:53Z
• Authors: Yixing Zhu; Huilin Li; Mengze Li; Yong Yu
• Keywords: Signature (topology)

Adaptor signature, a new primitive that alleviates the scalability issue of blockchain to some extent, has been widely adopted in off-chain payment channel and atomic swap. As an extension standard digital adaptor signature can bind release complete with exchange secret value. Existing constructions signatures are mainly based on Schnorr or ECDSA algorithms, which suffer low signing efficiency long length. In this paper, address these issues, we propose construction using randomized EdDSA, Schnorr-like structure higher shorter We prove required security properties, including unforgeability, witness extractability pre-signature adaptability, scheme random oracle model. conduct comparative analysis ECDSA-based demonstrate effectiveness feasibility our proposal.