你所有保存在浏览器上的密码都属于我们:一个安全分析和一个基于云计算的新设计

Rui Zhao, Chuan Yue
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引用次数: 39

摘要

为了保护自己在不同网站上的宝贵资产,网络用户正面临着创建、记忆和使用比以往任何时候都要强大的密码的艰巨挑战。密码管理器是解决这些问题的最流行的方法之一,它保存用户的密码,然后代表用户自动填写登录表单。幸运的是,所有五种最流行的Web浏览器都将密码管理器作为有用的内置功能提供了。不幸的是,所有这些基于浏览器的密码管理器(bpm)的设计都存在严重的安全漏洞。在本文中,我们揭示了现有bpm的漏洞,并分析了攻击者如何利用它们来破解用户保存的密码。此外,我们提出了一种新的基于云的无存储BPM (CSF-BPM)设计,以实现具有所需机密性、完整性和可用性属性的高级别安全性。我们在Firefox中实现了一个CSF-BPM系统,并评估了它的正确性和性能。我们相信CSF-BPM是一种合理的设计,也可以集成到其他流行的Web浏览器中。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
All your browser-saved passwords could belong to us: a security analysis and a cloud-based new design
Web users are confronted with the daunting challenges of creating, remembering, and using more and more strong passwords than ever before in order to protect their valuable assets on different websites. Password manager is one of the most popular approaches designed to address these challenges by saving users' passwords and later automatically filling the login forms on behalf of users. Fortunately, all the five most popular Web browsers have provided password managers as a useful built-in feature. Unfortunately, the designs of all those Browser-based Password Managers (BPMs) have severe security vulnerabilities. In this paper, we uncover the vulnerabilities of existing BPMs and analyze how they can be exploited by attackers to crack users' saved passwords. Moreover, we propose a novel Cloud-based Storage-Free BPM (CSF-BPM) design to achieve a high level of security with the desired confidentiality, integrity, and availability properties. We have implemented a CSF-BPM system into Firefox and evaluated its correctness and performance. We believe CSF-BPM is a rational design that can also be integrated into other popular Web browsers.
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