arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1402.2699cs.CRcs.SI
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基于托管的社会认证的安全性研究

On the Security of Trustee-based Social Authentications

Neil Zhenqiang Gong, Di Wang

摘要:

最近,在朋友的帮助下对用户进行认证(即,基于信任的社会认证)已被证明是一种有前途的备份认证机制。该系统中的用户与从用户的朋友中选择的几个受托人相关联。当用户想要重新访问帐户时,服务提供商向用户的受托人发送不同的验证码。用户必须获得至少k(即,恢复阈值)验证码,然后被指示重置他或她的密码。在本文中,我们提供了第一个系统的研究基于信任的社会认证的安全性。具体来说,我们首先介绍一种新的攻击框架,我们称之为森林火灾攻击。在这些攻击中,攻击者首先获得少量受损用户,然后攻击者通过利用基于信任的社交认证迭代地攻击其余用户。然后,我们构建了一个概率模型来形式化森林火灾攻击的威胁和攻击者的成本。此外,我们还介绍了各种防御策略。最后,我们应用我们的框架,广泛评估各种具体的攻击和防御策略,使用三个现实世界的社交网络数据集。我们的研究结果有很强的影响,设计更安全的基于信任的社会认证。

英文摘要:

Recently, authenticating users with the help of their friends (i.e., trustee-based social authentication) has been shown to be a promising backup authentication mechanism. A user in this system is associated with a few trustees that were selected from the user's friends. When the user wants to regain access to the account, the service provider sends different verification codes to the user's trustees. The user must obtain at least k (i.e., recovery threshold) verification codes from the trustees before being directed to reset his or her password. In this paper, we provide the first systematic study about the security of trustee-based social authentications. Specifically, we first introduce a novel framework of attacks, which we call forest fire attacks. In these attacks, an attacker initially obtains a small number of compromised users, and then the attacker iteratively attacks the rest of users by exploiting trustee-based social authentications. Then, we construct a probabilistic model to formalize the threats of forest fire attacks and their costs for attackers. Moreover, we introduce various defense strategies. Finally, we apply our framework to extensively evaluate various concrete attack and defense strategies using three real-world social network datasets. Our results have strong implications for the design of more secure trustee-based social authentications.

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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