Technical Surveillance Threat Levels
The threat posed by technical surveillance devices may be broken into ten basic levels. As each threat level increases the difficulty of detecting the device increases by an order of magnitude (for levels 1-9).
These threats are clustered into three major groupings, with a fourth group for emerging technologies or threats based on misunderstandings of technology or (in some cases) pure fantasy.
Each level correlates to specific types of eavesdropper, and equipment being used. Each level also correlates to a specific type of TSCM inspection, methods, and procedures.
Level 1 - Common Consumer Products and Toys
Level 2 - Amateur and Consumer Communications Products
Level 3 - Amateur Eavesdropping Products
Level 4 - Restricted Professional Products
Level 5 - Professional "Spy Shop" Products
Level 6 - Professional "Title 3" Products
Level 7 - Signals Intelligence Products
Level 8 - Intelligence Agency Eavesdropping Threats
Level 9 - National Security Eavesdropping Threats
Level X - Hypothetical, Misunderstood, or Delusional Threats
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