arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2104.09137cs.SIcs.CY
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面向访问控制决策的社区检测:分析在线社交网络中同质性与信息扩散的作用

Community Detection for Access-Control Decisions: Analysing the Role of Homophily and Information Diffusion in Online Social Networks

Nicolas E. Diaz Ferreyra, Tobias Hecking, Esma Aïmeur, Maritta Heisel, H. Ulrich Hoppe

AI总结:

本文研究利用社区检测自动生成OSN访问控制列表,通过仿真分析同质性对准确性的影响,并纳入信息扩散与守门人节点移除以缓解隐私泄露。

摘要:

访问控制列表(ACL,又称好友列表)是在线社交网络(OSN)最重要的隐私功能之一,因为它们允许用户限制其发布内容的受众。然而,创建和维护自定义ACL通常会给普通OSN用户带来很高的认知负担,因为这往往需要评估大量联系人的可信度。原则上,可以利用社区检测算法来支持ACL的生成,方法是将一组示例(即被标记为不可信的联系人)映射到用户自我中心网络中涌现的社区。但是,与用户的访问控制偏好不同,传统社区检测算法不会考虑这些社区的同质性特征(即成员之间共享的属性)。因此,在某些同质性情形下,这种策略可能导致不准确的ACL配置和隐私泄露。本研究考察了如何使用社区检测算法在OSN中自动生成ACL。具体而言,本文通过一个仿真模型分析上述方法在不同同质性条件下的性能。此外,由于私人信息可能通过OSN的转发功能进入不可信接收者的可见范围,本文还对信息扩散过程进行建模并予以明确考虑。在此基础上,本文进一步探索移除守门人节点作为抵消非预期数据传播的策略。

英文摘要:

Access-Control Lists (ACLs) (a.k.a. friend lists) are one of the most important privacy features of Online Social Networks (OSNs) as they allow users to restrict the audience of their publications. Nevertheless, creating and maintaining custom ACLs can introduce a high cognitive burden on average OSNs users since it normally requires assessing the trustworthiness of a large number of contacts. In principle, community detection algorithms can be leveraged to support the generation of ACLs by mapping a set of examples (i.e. contacts labelled as untrusted) to the emerging communities inside the user's ego-network. However, unlike users' access-control preferences, traditional community-detection algorithms do not take the homophily characteristics of such communities into account (i.e. attributes shared among members). Consequently, this strategy may lead to inaccurate ACL configurations and privacy breaches under certain homophily scenarios. This work investigates the use of community-detection algorithms for the automatic generation of ACLs in OSNs. Particularly, it analyses the performance of the aforementioned approach under different homophily conditions through a simulation model. Furthermore, since private information may reach the scope of untrusted recipients through the re-sharing affordances of OSNs, information diffusion processes are also modelled and taken explicitly into account. Altogether, the removal of gatekeeper nodes is further explored as a strategy to counteract unwanted data dissemination.

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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