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Anonymization of Centralized and Distributed Social Networks
1. ANONYMIZATION OF CENTRALIZED AND DISTRIBUTED SOCIAL
NETWORKS BY SEQUENTIAL CLUSTERING
ABSTRACT:
We study the problem of privacy-preservation in social networks. We consider the distributed
setting in which the network data is split between several data holders. The goal is to arrive at an
anonymized view of the unified network without revealing to any of the data holders information
about links between nodes that are controlled by other data holders. To that end, we start with the
centralized setting and offer two variants of an anonymization algorithm which is based on
sequential clustering (Sq).
Our algorithms significantly outperform the SaNGreeA algorithm due to Campan and Truta
which is the leading algorithm for achieving anonymity in networks by means of clustering. We
then devise secure distributed versions of our algorithms. To the best of our knowledge, this is
the first study of privacy preservation in distributed social networks. We conclude by outlining
future research proposals in that direction.
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