New ACJT based generalized group signcryption

doi:10.3778/j.issn.1002-8331.2008.31.037

Computer Engineering and Applications ›› 2008, Vol. 44 ›› Issue (31): 128-131.DOI: 10.3778/j.issn.1002-8331.2008.31.037

• 网络、通信、安全 • Previous Articles Next Articles

New ACJT based generalized group signcryption

LI Mao-tang¹,YANG Xiao-yuan^1,2,HAN Yi-liang¹,WEI Li-xian¹,LAI Xue-jia³

1.Key Laboratory of Network & Information Security of APF，Engineering College of APF，Xi’an 710086，China
2.Key Laboratory of Network & Information Security of the Ministry of Education，Xidian University，Xi’an 710071，China
3.Department of Computer Science and Engineering，Shanghai Jiaotong University，Shanghai 200240，China

Received:2007-12-03 Revised:2008-03-31 Online:2008-11-01 Published:2008-11-01
Contact: LI Mao-tang

基于ACJT的广义群签密方案

黎茂棠¹,杨晓元^1,2,韩益亮¹,魏立线¹,来学嘉³

1.武警工程学院电子技术系网络与信息安全武警部队重点实验室，西安 710086
2.西安电子科技大学网络信息安全教育部重点实验室，西安 710071
3.上海交通大学电信学院计算机科学与工程系，上海 200240

通讯作者: 黎茂棠

Abstract

Abstract: Group signcryption is a new cryptographic primitive that simultaneously fulfills both the functions of group signature and group encryption.Generalized group signcryption is proposed，which can provide authenticity separately under specific inputs.Based on ACJT，a group signcryption scheme called SC-ACJT is designed.It will be equivalent to ACJT when the recipient is absent.SC-ACJT has solved the dynamic member management，its computational cost is separated to the group scale.In group signcryption mode，SC-ACJT can do without the computational cost of group shared key compared with Kwak-Moon（Ⅱ），while in group signature mode，SC-ACJT can reduce the computational cost of an additional group signature.

Key words: signcryption, group signature, ACJT scheme, group signcryption

摘要： 群签密是一种能够同时提供群签名和群加密的密码体制。首次将群签密的应用范围推广到仅需要完整性的场合，给出了广义群签密的定义。广义群签密既有群签密的属性，又有对特定的输入单独提供群签名的功能。基于ACJT群签名方案，提出了一个新的群签密方案SC-ACJT。在没有特定的接收方时方案等价于ACJT群签名。相对于现有的群签密方案，SC-ACJT解决了动态成员管理的问题，计算量不依赖于成员的数目。在群签密模式下，SC-ACJT比Kwak-Moon（Ⅱ）少了计算群共享密钥的计算量；在群签名模式下，SC-ACJT比现有方案节省一个附加的群签名算法。

关键词: 签密, 群签名, ACJT, 群签密

LI Mao-tang¹,YANG Xiao-yuan^1,2,HAN Yi-liang¹,WEI Li-xian¹,LAI Xue-jia³. New ACJT based generalized group signcryption[J]. Computer Engineering and Applications, 2008, 44(31): 128-131.

黎茂棠¹,杨晓元^1,2,韩益亮¹,魏立线¹,来学嘉³. 基于ACJT的广义群签密方案[J]. 计算机工程与应用, 2008, 44(31): 128-131.

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New ACJT based generalized group signcryption

基于ACJT的广义群签密方案

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