摘要
对现有的各种公平交换协议进行了分类.利用公开可验证秘密共享原理、群加密方案,提出一 个新的基于离线半可信第三方的多方公平交换协议,离线第三方只在意外情况下才介入协议且其只能解密半 个密钥分量,既保证了交换数据的机密性又实现了交易的真正公平,且交换的拓扑关系也对外(包括第三方) 保密.
The fair exchange protocols are classified. Based on publicly verifiable secret sharing scheme and group encryption scheme, a new multi-party fair exchange protocol with an off-line Semi-Trusted Third Party(off-STTP) is presented. The off-STTP intervenes into the exchange in case of problems. That the off-STTP can decipher a sub-secret key makes sure the confidentiality of exchange data and the true fairness of the barter. The participants can barter with others at their will and the exchange topology is unknown to others including the off-STTP.
出处
《电子与信息学报》
EI
CSCD
北大核心
2004年第8期1340-1344,共5页
Journal of Electronics & Information Technology
基金
国家自然科学基金(No.10271069)
陕西省自然科学基础研究计划项目(2002A03)
陕西师大重点科研项目资助课题
关键词
不可否认
公开可验证秘密共享(PVSS)
群加密
组播
Non-repudiation, Publicly Verifiable Secret Sharing(PVSS), Group encryption, Group broadcasting
