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| 基于门限签名方案的BQS系统的服务器协议 |
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荆继武1, 王晶2, 林璟锵1, 谢永泉1, 顾青3
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1.中国科学院 研究生院 信息安全国家重点实验室,北京 100049;2.中国科学院 研究生院 信息安全国家重点实验室,北京 100049
中国科学技术大学 电子工程与信息科学系,安徽 合肥 230027;3.国家863计划信息安全基础设施研究中心,上海 200336
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| 摘要: |
| 利用冗余复制技术,BQS(Byzantine quorum system)系统在异步信道上提供了能容忍f台服务器拜占庭失效的存储服务.COCA系统和CODEX系统设计了一种结合门限签名方案和BQS系统的服务器协议,完成了TSS-BQS(threshold signature schemes-BQS)系统.与普通BQS系统相比,具有更易于支持Proactive Recovery,简化客户端密钥管理和客户端通信的优点.基于相同的系统模型和信道假设,提出了一种新的服务器协议,满足TSS-BQS系统的安全要求;而且与已有协议相比,该协议只需更少的通信轮数,在读/写并发情况下执行效果
更优. |
| 关键词: 拜占庭选举系统 门限签名方案 攻击容忍 服务器协议 容错 |
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| 基金项目:Supported by the National Natural Science Foundation of China under Grant No.70890084/G021102 (国家自然科学基金); the National High-Tech Research and Development Plan of China under Grant No.2006AA01Z454 (国家高技术研究发展计划(863)) |
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| Server Protocols of Byzantine Quorum Systems Implemented Utilizing Threshold Signature Schemes |
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JING Ji-Wu,WANG Jing,LIN Jing-Qiang,XIE Yong-Quan,GU Qing
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| Abstract: |
| Byzantine quorum systems (BQSs) provide attack-resilient storage services over asynchronous channels and tolerate f servers’ Byzantine failures. COCA (Cornell online certification authority) and CODEX (COrnell Data EXchange) have designed a server protocol to implement BQSs threshold signature schemes (TSS-BQSs), which can execute proactive recovery, conveniently, and can simplify the key management and communication of clients. Under the same system model and channel assumptions, a new server protocol that satisfies the security requirements of TSS-BQS is proposed. The proposed protocol involves less rounds of communication and performs better than that of COCA/CODEX in the case of concurrent read-write operations. |
| Key words: Byzantine quorum system threshold signature scheme attack-resilience server protocol fault-tolerance |
