International Conference on Information and Knowledge Technology

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Revert Propagation: Who are responsible for a contagion initialization in a Diffusion Network?

Authors :

Arman Sepehr¹ Mohammadzaman Zamani² Hamid Beigy³ Shabnam Behzad⁴

1- دانشگاه صنعتی شریف 2- Stony Brook University 3- دانشگاه صنعتی شریف 4- Georgetown University

Keywords :

Source Localization, Information Propagation, Diffusion Networks, Information Cascades

Abstract :

Millions of stories are transferred in a social network and some of them are malicious. Can we identify the source node(s) that are responsible to initiate the propagation originally? If so, when they initiated the propagation? In this paper, we present an efficient algorithm for finding a node initiating a piece of information into the network and also inferring the time when it is initiated. We propose Source Location Estimation method, sole, that estimate the source probability for each node and then choose the source set which are maximize the probability using a well-known greedy method with a theoretical guarantees. The Observed nodes are detected nodes which are known clearly that spread specified malicious information in the network but small fraction of nodes are detected. The latter infected nodes are hidden, which spread the information in the network, however, they're not identified yet. In this problem, we first estimate the shortest path between other nodes to observed ones for each propagation trace, sole. Our experiments on real-world propagation through networks show the superiority of our approach in detecting true sources and promote the top ten accuracy from less than $10\%$ for the state-of-the-art methods to approximately $30\%$.