arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1809.09331cs.SIcs.AIcs.LG
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早期识别致病性社交媒体账户

Early Identification of Pathogenic Social Media Accounts

Arizona State University(亚利桑那州立大学)

Hamidreza Alvari, Elham Shaabani, Paulo Shakarian

摘要:

致病性社交媒体(PSM)账户,如恐怖分子支持者,利用大量的支持者社区在社交媒体上进行攻击。及早发现这些账户至关重要,因为它们很可能是使有害信息“病毒式传播”的关键用户。在本文中,我们首次尝试利用因果推理,以确定PSM在很短的时间内,他们的活动。我们提出了一个时间衰减的因果关系度量,并将其纳入因果社区发现为基础的算法。该算法被应用到共享相似的因果关系特征的帐户组,然后通过分类算法将帐户分类为PSM或不。与需要大量时间来收集网络、级联路径或内容等信息的现有技术不同,我们的方案仅依赖于用户的操作日志。来自Twitter的真实数据集上的结果证明了我们方法的有效性和效率。我们仅根据PSM的前10天活动来检测PSM,其精度达到0.84;然后在10天后检测到错误分类的帐户。

英文摘要:

Pathogenic Social Media (PSM) accounts such as terrorist supporters exploit large communities of supporters for conducting attacks on social media. Early detection of these accounts is crucial as they are high likely to be key users in making a harmful message "viral". In this paper, we make the first attempt on utilizing causal inference to identify PSMs within a short time frame around their activity. We propose a time-decay causality metric and incorporate it into a causal community detection-based algorithm. The proposed algorithm is applied to groups of accounts sharing similar causality features and is followed by a classification algorithm to classify accounts as PSM or not. Unlike existing techniques that take significant time to collect information such as network, cascade path, or content, our scheme relies solely on action log of users. Results on a real-world dataset from Twitter demonstrate effectiveness and efficiency of our approach. We achieved precision of 0.84 for detecting PSMs only based on their first 10 days of activity; the misclassified accounts were then detected 10 days later.

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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