arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2310.04898cs.CR
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面向分段网络的可扩展多域信任基础设施

Scalable Multi-domain Trust Infrastructures for Segmented Networks

Sam Grierson, William J Buchanan, Craig Thomson, Baraq Ghaleb, Leandros Maglaras, Chris Eckl

AI总结:

针对分段网络中传统信任基础设施存在的无可信分发节点、签名方案难扩展的问题,提出基于Edwards曲线数字签名算法的无领导者多信任域构建方法,实现签名阶段计算开销基本恒定。

摘要:

在信任基础设施中,私钥通常用于对交易进行数字签名,可通过对应的公钥进行验证。借助PKI(公钥基础设施),可信实体可生成数字签名,以验证公钥的真实性。然而,当外部实体不可信、无法验证公钥,或是在隔离或自主运行的设备集群中不存在互联网连接时,会出现什么问题?对此,可选出一个可信实体生成密钥对,再将私钥拆分给多个可信设备。随后每个节点可使用其持有的共享秘密分片对交易进行部分签名,聚合后的签名即可代表基础设施内就共识达成的一致意见。遗憾的是,该过程存在两个显著问题:一是没有可信节点可充当份额分发者,二是数字签名方案难以扩展。本文提出了一种无领导者的信任域定义方法,以克服椭圆曲线数字签名算法在扩展性上的缺陷。该方法转而采用Edwards曲线数字签名算法来定义多个信任区域。研究表明,分布式密钥生成阶段的计算开销会随信任域内节点数量的增加而上升,但分布式签名的计算开销则保持相对恒定。

英文摘要:

Within a trust infrastructure, a private key is often used to digitally sign a transaction, which can be verified with an associated public key. Using PKI (Public Key Infrastructure), a trusted entity can produce a digital signature, verifying the authenticity of the public key. However, what happens when external entities are not trusted to verify the public key or in cases where there is no Internet connection within an isolated or autonomously acting collection of devices? For this, a trusted entity can be elected to generate a key pair and then split the private key amongst trusted devices. Each node can then sign part of the transaction using their split of the shared secret. The aggregated signature can then define agreement on a consensus within the infrastructure. Unfortunately, this process has two significant problems. The first is when no trusted node can act as a dealer of the shares. The second is the difficulty of scaling the digital signature scheme. This paper outlines a method of creating a leaderless approach to defining trust domains to overcome weaknesses in the scaling of the elliptic curve digital signature algorithm. Instead, it proposes the usage of the Edwards curve digital signature algorithm for the definition of multiple trust zones. The paper shows that the computational overhead of the distributed key generation phase increases with the number of nodes in the trust domain but that the distributed signing has a relatively constant computational overhead.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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