Contents 1)     Introduction. 2 2)     Information Leakage. 2 3)     Types of Information Leakage. 4 a) Intentional Leaks. 4 i) Internal Agents. 5 ii) External Agents. 6 b) Accidental Leaks. 6 4)     Exploitation Channels. 8 a) Electronic Mail 8 b) Hard Copy. 9 c) Improper Configuration of Security Systems. 9 i)