Concurrent Signatures: Security Notions, Analysis, and Construction Issues

• Main Authors: Huanzhong Huang, 黃煥中
• Other Authors: Sung-ming Yen
• Format: Others
• Language: en_US
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/2yvmv4

碩士 === 國立中央大學 === 資訊工程研究所 === 96 === The notion of concurrent signatures, which is evolved from the notion of fair exchange of digital signatures, is aimed to provide an (even more) practical solution to the problem of fair exchange of signatures between parties that are mutually distrustful. Concurrent signature schemes are originally based on the notion of ring signatures; features of a ring signature seems perfectly match the notion of concurrent signatures. Nevertheless, this cannot be the only case; concrete schemes based on other ways of construction have also been published. In this thesis, analysis of concurrent signature schemes that are based on different approaches is conducted. Moreover, extended investigation regarding implicit but important security notions of concurrent signatures which were never stressed before, as well as the possibility of taking a particular way to construct a concurrent signature scheme have also been made.