Some articles on tscm:

Countersurveillance By Countries - In The United States Military
... countersurveillance as "technical surveillance counter-measures" (TSCM) and relates it to ELINT, SIGINT and ECM ... The United States Department of Defense defines a TSCM survey as a service provided by qualified personnel to detect the presence of technical surveillance devices and hazards ... A TSCM survey will provide a professional evaluation of the facility's technical security posture and normally will consist of a thorough visual, electronic ...