Efficient online-friendly two-party ECDSA signature

• Main Authors: XUE, Haiyang, AU, Ho Man, XIE, Xiang, YUEN, Hon Tsz, CUI, Handong
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 2021
• Subjects: ECDSA; threshold signature; two-party signature; blockchain; zero knowledge proof; Information Security
• Online Access: https://ink.library.smu.edu.sg/sis_research/9188; https://ink.library.smu.edu.sg/context/sis_research/article/10193/viewcontent/3460120.3484803.pdf
• Institution: Singapore Management University

Two-party ECDSA signatures have received much attention due to their widespread deployment in cryptocurrencies. Depending on whether or not the message is required, we could divide two-party signing into two different phases, namely, offline and online. Ideally, the online phase should be made as li...