可验证的多策略秘密共享方案  

A Verifiable Multi-Policy Secret Sharing Scheme

作　　者：王锋[1,2,3] 谷利泽[1,2,3] 郑世慧[1,2,3] 杨义先[1,2,3] 胡正名[1,2,3] 

机构地区：[1]北京邮电大学网络与交换技术国家重点实验室,北京100876 [2]北京邮电大学网络信息攻防教育部重点实验室,北京100876 [3]北京邮电大学灾备技术国家工程实验室,北京100876

出　　处：《北京邮电大学学报》2010年第6期72-75,共4页Journal of Beijing University of Posts and Telecommunications

基　　金：国家重点基础研究发展计划项目(2007CB310704);国家自然科学基金项目(90718001);国家高技术研究发展计划项目(2009AA01Z439)

摘　　要：可验证多重秘密共享方案普遍不能区分共享群组密钥的安全等级,即分享群组密钥的门限值相等,为此,提出了一种可验证的多策略秘密共享方案.在该方案中,密钥分发者能根据分发群组密钥的安全等级选择不同的门限值;在群组密钥分发和重构过程中,能实现参与者对密钥分发者和重构者对参与者的验证,及时检测和识别密钥分发者对参与者以及参与者对密钥重构者的欺骗,从而提高重构群组密钥的成功率;参与者的子密钥能重复使用,可减少密钥分发者的计算负担,提高方案的效率.该方案具有较高的安全性和实用性.The secret sharing schemes are important techniques for key management. However, most verifiable multi-secret sharing schemes can not distinguish the security classification because of having the common drawback of sharing secrets with the same value. A verifiable multi-policy secret sharing scheme is proposed. The significant character of the proposed scheme is that each participant has to be kept only one master secret share, the share can be used to reconstruct different group secrets according to the number of threshold values. So it will reduce the calculated amount of the secret distributor. Moreover, the efficient solutions against multiform cheating are proposed, the scheme is therefore with highly security and practicality.

关 键 词：秘密共享 验证性 多策略 密钥管理 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]