Functional signatures: new definition and constructions

• Main Authors: GUO, Qingwen, HUANG, Qiong, MA, Sha, XIAO, Meiyan, YANG, Guomin, SUSILO, Willy
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 2021
• Subjects: cloud computation security; digital signature; functional signature; non-interactive zeroknowledge proof; e-commerce; E-Commerce; Information Security
• Online Access: https://ink.library.smu.edu.sg/sis_research/7298; https://ink.library.smu.edu.sg/context/sis_research/article/8301/viewcontent/222301.pdf
• Institution: Singapore Management University

Functional signatures (FS) enable a master authority to delegate its signing privilege to an assistant. Concretely, the master authority uses its secret key sk(F) to issue a signing key sk(f) for a designated function f is an element of F-FS and sends both f and sk(f) to the assistant E, which is th...