This report is a summary for the research paper that introduces the notion of Correlated Source Extractors. The paper answers the question of security of cryptographic protocols in which correlated tapes are used over multiple executions of the protocol by introducing the notion of a ‘Correlated Source Extractor’and giving a construction of that. They solve the mentioned problem in two settings, namely, Zero Knowledge and Multi Party Computational protocols. In the report, we attempt to ‘extract’and present the main ideas and techniques from the paper.