arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.11211cs.SIcs.CRmath.PRmath.STstat.TH
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自适应扩散下的多观测谣言源检测

Rumor source detection with multiple observations under adaptive diffusions

Miklos Z. Racz, Jacob Richey

摘要:

最近的工作,匿名消息平台的动机,引入了自适应扩散协议,可以混淆谣言的来源:一个“快照对手”与访问“感染”节点的子图可以做得不比随机猜测源节点的实体。如果对手可以访问多个独立的快照,会发生什么?当底层图是无限$d$-正则树时,我们研究了这个问题.我们证明了(1)在两个独立快照的情况下,弱形式的源混淆仍然是可能的,但是(2)已经有三个观察结果,有一个简单的算法可以以恒定的概率找到谣言源,而不管自适应扩散协议。我们还描述了自适应扩散协议(在一个单一的快照)的本地传播和源混淆之间的权衡。这些结果提出了关于在社交网络中传播信息时匿名保证的鲁棒性的问题。

英文摘要:

Recent work, motivated by anonymous messaging platforms, has introduced adaptive diffusion protocols which can obfuscate the source of a rumor: a "snapshot adversary" with access to the subgraph of "infected" nodes can do no better than randomly guessing the entity of the source node. What happens if the adversary has access to multiple independent snapshots? We study this question when the underlying graph is the infinite $d$-regular tree. We show that (1) a weak form of source obfuscation is still possible in the case of two independent snapshots, but (2) already with three observations there is a simple algorithm that finds the rumor source with constant probability, regardless of the adaptive diffusion protocol. We also characterize the tradeoff between local spreading and source obfuscation for adaptive diffusion protocols (under a single snapshot). These results raise questions about the robustness of anonymity guarantees when spreading information in social networks.

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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