关键词: 公平防抵赖, Web, 证据链接, 及时性

Abstract:

Since more and more transaction systems are built using Web technology, users generally work on thin nodes with the browser where users only can access the internet actively and can not be accessed passively. The non-repudiation service implemented currently mostly does not consider the requirement of fairness and the fair non-repudiation protocols to date can not be suitably applied in real environment due to its complexity of interaction. This paper proposes a practical and fair online-TTP non-repudiation protocol which simplifies protocol interaction with the aid of TTP and can be embedded in one round exchange for HTTP request and response. Evidence chaining is introduced to make TTP process centrally simplify evidence verification and management and decrease the cost of certificate revocation checking and time-stamp generation for signatures on the client-side. The protocol owns properties of strong fairness and timeliness.

Key words: fair non-repudiation, Web, evidence chaining, timeliness