In organizations sensitive data transaction is having less security because there may be a misusability of data from one to other from past years. In previous methods they calculated how much data is leaked but didn't find who is leaked. In this paper, the authors find leakage and leaker. A data distributor has given sensitive data to a set of supposedly trusted agents (third parties). Some of the data has leaked and found in an unauthorized place (e.g., on the web or somebody's laptop).