Paper Title
A Security Mechanism In Social Networks By Guilty Leakage Detection

This paper aims to find the guilty of leakage of information in social networks. Here watermarking and lineage mechanism are used for security and thus to find the guilty of private information leakages in social networks. Here three entities are important. That are Owner, Consumer and Auditor. Owner can give documents to consumers. Owner can manage documents. Consumer can share documents to other consumer. Thus Owner can make lineage. Auditor will invoke only when a leakage will happen. Auditor can challenge each consumer to prove their genuinity. If any consumer cannot prove their genuinity that consumer will be the guilty one. We are using watermarks using text files. We can use video , audio or image files in the place of text files. Keywords— Watermark, Data provenance, Digital watermark, Lineage mechanism.