F-rsig — Ring signature

F-rsig (Ring signature) is part of Privacy and Anonymity in the UC functionality encyclopedia. Status: a canonical, well-established UC functionality.

Long lacked a settled UC formulation; two papers (2007 and 2022) now anchor it, though the earlier one has not been independently verified here.

References:

• Yoneyama and Ohta. Ring signatures: Universally composable definitions and constructions. Information and Media Technologies, 2(4):1038–1051, 2007.
• Branco, Döttling, and Wohnig. Universal ring signatures in the standard model. In Advances in Cryptology – ASIACRYPT 2022, Part IV, volume 13794 of LNCS, pages 249–278, 2022.