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arXiv 1608.04563cs.CR
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SALVE:服务器身份验证和位置验证

SALVE: Server Authentication with Location VErification

Der-Yeuan Yu, Aanjhan Ranganathan, Ramya Jayaram Masti, Claudio Soriente, Srdjan Capkun

摘要:

由电信行业提出的位置服务(LCS)是允许在各种应用中访问移动设备的位置的架构。我们探讨了LCS在位置增强型服务器身份验证中的使用,这种身份验证传统上依赖于证书。鉴于最近发生的涉及证书颁发机构的事件,提出了各种加强服务器认证的技术。它们专注于改进证书验证过程,例如固定、撤销或多路径探测。在本文中,我们建议使用服务器的地理位置作为其真实性的第二个因素。我们的解决方案SALVE通过使用安全的DNS解析和利用LCS进行位置测量来实现基于位置的服务器身份验证。我们开发了一个TLS扩展,使客户端能够验证服务器的位置,除了它的证书。因此,成功的服务器认证需要有效的证书和服务器位于合法的地理位置,例如,在数据中心的前提下。SALVE可防止远程攻击者使用错误颁发的证书或窃取的合法服务器私钥来冒充服务器。我们开发了一个原型实现和我们在现实世界中的设置评估表明,它会产生最小的影响,平均服务器吞吐量。我们的解决方案是向后兼容的,可以与现有的方法集成,以改善TLS中的服务器身份验证。

英文摘要:

The Location Service (LCS) proposed by the telecommunication industry is an architecture that allows the location of mobile devices to be accessed in various applications. We explore the use of LCS in location-enhanced server authentication, which traditionally relies on certificates. Given recent incidents involving certificate authorities, various techniques to strengthen server authentication were proposed. They focus on improving the certificate validation process, such as pinning, revocation, or multi-path probing. In this paper, we propose using the server's geographic location as a second factor of its authenticity. Our solution, SALVE, achieves location-based server authentication by using secure DNS resolution and by leveraging LCS for location measurements. We develop a TLS extension that enables the client to verify the server's location in addition to its certificate. Successful server authentication therefore requires a valid certificate and the server's presence at a legitimate geographic location, e.g., on the premises of a data center. SALVE prevents server impersonation by remote adversaries with mis-issued certificates or stolen private keys of the legitimate server. We develop a prototype implementation and our evaluation in real-world settings shows that it incurs minimal impact to the average server throughput. Our solution is backward compatible and can be integrated with existing approaches for improving server authentication in TLS.

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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