Wherefore Art Thou R3579X? Anonymized Social Networks
Hidden Patterns and Structural Steganography



Lars Backstrom

Cornell University

Monday  April 16, 2007
4:00 PM, 5130 Upson Hall



In a social network, nodes correspond to people or other social entities, and edges correspond to social links between them. In an effort to preserve privacy, the practice of anonymization replaces names with meaningless unique identifiers. We describe a family of attacks such that even from a single anonymized copy of a social network, it is possible for an adversary to learn whether edges exist or not between specific targeted pairs of nodes.