Abstract: As the third party payment is introduced into a Four-participants Virtual Economy System(4P_VES) to detect and prevent collusion cheat,so many interactions are added,and the system performance is affected.Aiming at the problem,this paper proposes an improved 4P_VES by commitment-signature scheme based on fusion primitive.Commitment-signature scheme realizes commitment verification and signature authentication,and simplifies the interactions.Multisignature reduces the times of signature verification.Analysis result shows that the improved 4P_VES scheme maintain the properties of unforgeability,consistency,unreusability,and it can reduce time cost,improve system overall performance.

Key words: virtual transaction system, virtual coin, usion primitive, commitment-signature scheme, multisignature

摘要： 四方参与者虚拟交易系统(4P_VES)在引入第三方支付检测和预防合谋欺骗行为后会增加系统交互流程,影响系统性能。为此,通过融合承诺与签名原语定义承签方案,提出改进的4P_VES方案。采用承签方案同时实现承诺验证与签名认证功能,简化交互流程,并利用多重签名技术减少签名验证次数。分析结果表明,改进的4P_VES方案具有不可伪造性、一致性、不可区分性等属性,且能降低虚拟币发行时间,提高系统整体性能。

关键词: 虚拟交易系统, 虚拟币, 融合原语, 承签方案, 多重签名

CLC Number: 

• TP309.2