A new efficient optimistic fair exchange protocol without random oracles

• Main Authors: HUANG, Qiong, YANG, Guomin, WONG, Duncan S., SUSILO, Willy
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 2012
• Subjects: CDH assumption; Optimistic fair exchange; Standard model; Time capsule signature; Information Security
• Online Access: https://ink.library.smu.edu.sg/sis_research/7351; https://ink.library.smu.edu.sg/context/sis_research/article/8354/viewcontent/s10207_011_0152_3.pdf
• Institution: Singapore Management University

Optimistic fair exchange (OFE) is a kind of protocols to solve the problem of fair exchange between two parties. Most of the previous work on this topic are provably secure in the random oracle model. In this work, we propose a new construction of OFE from another cryptographic primitive, called tim...