基于無證書的多方合同簽署協(xié)議

曹素珍; 王斐; 郎曉麗; 汪銳; 劉雪艷

doi:10.11999/JEIT190166

基于無證書的多方合同簽署協(xié)議

doi: 10.11999/JEIT190166 cstr: 32379.14.JEIT190166

1.
西北師范大學(xué)計(jì)算機(jī)科學(xué)與工程學(xué)院蘭州 730070
2.
西北師范大學(xué)數(shù)學(xué)與統(tǒng)計(jì)學(xué)院蘭州 730070

基金項(xiàng)目: 國家自然科學(xué)基金(61662071, 61662069, 61562077)

詳細(xì)信息

作者簡介:
曹素珍：女，1976年生，副教授，研究方向?yàn)楣 €密碼學(xué)和軟件安全

王斐：女，1992年生，碩士生，研究方向?yàn)槊艽a學(xué)與信息安全

郎曉麗：女，1993年生，碩士生，研究方向?yàn)槊艽a學(xué)與信息安全

汪銳：男，1991年生，碩士生，研究方向?yàn)槊艽a學(xué)與信息安全

劉雪艷：女，1978年生，副教授，研究方向?yàn)榻M密鑰協(xié)商、密碼協(xié)議形式化分析

通訊作者:
王斐　wf9211@126.com

中圖分類號: TP309
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出版歷程
- 收稿日期: 2019-03-21
- 修回日期: 2019-06-25
- 網(wǎng)絡(luò)出版日期: 2019-07-09
- 刊出日期: 2019-11-01

Multi-party Contract Signing Protocol Based on Certificateless

1.
College of Computer Science and Engineering, Northwest Normal University, Lanzhou 730070, China
2.
College of Mathematics and Statistics, Northwest Normal University, Lanzhou 730070, China

Funds: The National Natural Science Foundation of China (61662071, 61662069, 61562077)

摘要

摘要: 線上合同簽署在電子商務(wù)中日益普及，在互不信任的簽署方之間簽署一份合同并不是一件簡單的事情，各方就合同簽署問題提出過許多合同簽署協(xié)議。其中較多的協(xié)議是帶有第三方參與的，但是在效率方面并不占優(yōu)勢，且易出現(xiàn)安全問題。現(xiàn)有借助區(qū)塊鏈技術(shù)取代第三方參與的合同簽署協(xié)議中，區(qū)塊鏈的公開驗(yàn)證對不管是簽署方還是待簽署合同的敏感信息又發(fā)起了挑戰(zhàn)。且大多協(xié)議針對于雙方合同簽署，隨著簽署方數(shù)量的增加，協(xié)議的通信成本和復(fù)雜度都在急劇增加。該文結(jié)合現(xiàn)有協(xié)議，提出一個(gè)高效的多方合同簽署協(xié)議，協(xié)議中通過基于無證書的高效聚合簽名方案，用于提高區(qū)塊鏈下簽署方簽名驗(yàn)證效率，在區(qū)塊鏈上僅公開簽署方的臨時(shí)密鑰以減少系統(tǒng)開銷。該協(xié)議滿足正確性、安全性、公平性、私密性以及高效性。
- 聚合可驗(yàn)證簽名 /
- 隱私保護(hù) /
- 區(qū)塊鏈 /
- 合同簽署
Abstract: Online contract signing is becoming more and more popular in e-commerce. It is not easy to sign a contract between two parties who do not trust each other. Many of these protocols involve the participation of third parties, but they are not advantageous in efficiency and prone to security problems. Currently, contract signing agreements with third-party participation are replaced by block chain technology, but the public verification of block chain challenges the sensitive information of both the signer and the contract to be signed. And most of the agreements are for the signing of contracts between the two parties. With the increase of the number of signatories, the communication cost and complexity of the agreements increase sharply. Combined with the existing protocols, this paper proposes an efficient multi-party contract signing protocol. In the protocol, an efficient aggregation signature scheme based on no certificate is used to improve the signature verification efficiency of the signer under the block chain, and only the temporary key of the signer is disclosed on the block chain to reduce the system overhead. The protocol satisfies the requirements of correctness, security, fairness, privacy and high efficiency.
- Aggregation verifiable signature /
- Privacy protection /
- Blockchain /
- Contract signing

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圖 1 交易${T_1}$

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表 1 本協(xié)議與現(xiàn)有協(xié)議比較

協(xié)議	簽署方	第三方	簽名驗(yàn)證次數(shù)	簽名驗(yàn)證開銷
文獻(xiàn)[9]	2	√	2	$3e + 1s + 1h$
文獻(xiàn)[10]	$n$	√	$n$	$(2n + 1)e + ns + nh$
文獻(xiàn)[12]	$n$	–	1	$(4n + 1)e + (2n + 1)h$
本協(xié)議	$n$	–	1	$(3n + 2)s + 2nh$

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