Technical Surveillance Countermeasures
- (TSCM) Techniques and measures to detect and neutralize a wide variety of hostile penetration technologies that are used to obtain unauthorized access to protected information. *Techniques and measures to detect and neutralize a wide variety of hostile penetration technologies that are used to obtain unauthorized access to classified and sensitive information. Technical penetrations include the employ of optical, electro-optical, electromagnetic, fludic, and acoustic means, as the sensor and transmission medium, or the use of various types of stimulation of or modification to equipment or building components for the direct or indirect transmission of information meant to be protected. (IC Staff, Glossary of Intelligence Terms and Definitions, 6/89)
