使用可信硬件进行物理限制的身份验证

Michael S. Kirkpatrick, E. Bertino
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引用次数: 5

摘要

现代计算机系统允许用户从远程位置访问受保护的信息。在某些安全环境中,最好限制对特定计算机或计算机集的访问。由于两个原因,现有的机器级身份验证解决方案是不可取的。首先,它们不允许细粒度的应用层访问决策。其次,它们容易受到受信任的管理员恶意进行的内部攻击。在这项工作中,我们描述了一种使用安全硬件解决这些问题的新方法。在我们的设计中,安装一个系统需要多个管理员。安装后,身份验证特权物理地链接到该机器,没有管理员可以绕过这些控制。我们定义了一个管理模型,并详细说明了与我们的方法兼容的身份验证协议的需求。我们的设计为大型系统提出了一些挑战,除了减少维护的好处。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Physically restricted authentication with trusted hardware
Modern computer systems permit users to access protected information from remote locations. In certain secure environments, it would be desirable to restrict this access to a particular computer or set of computers. Existing solutions of machine-level authentication are undesirable for two reasons. First, they do not allow fine-grained application layer access decisions. Second, they are vulnerable to insider attacks in which a trusted administrator acts maliciously. In this work, we describe a novel approach using secure hardware that solves these problems. In our design, multiple administrators are required for installation of a system. After installation, the authentication privileges are physically linked to that machine, and no administrator can bypass these controls. We define an administrative model and detail the requirements for an authentication protocol to be compatible with our methodology. Our design presents some challenges for large-scale systems, in addition to the benefit of reduced maintenance.
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