Stronger Security and Generic Constructions for Adaptor Signatures

ePrint Report: Stronger Security and Generic Constructions for Adaptor Signatures

Wei Dai, Tatsuaki Okamoto, Go Yamamoto

Adaptor signatures have seen wide applications in layer-2 and peer-to-peer blockchain ap- plications such as atomic swaps and payment channels. We first identify two shortcomings of previous literature on adaptor signatures. (1) Current aim of “script-less” adaptor signatures restricts instantiability, limiting designs based on BLS or current NIST PQC candidates. (2) We identify gaps in current formulations of security. In particular, we show that …

eprint report security signatures