TSCM: Professional Counter-Surveillance

Technical Surveillance Countermeasures (TSCM) is the practice of detecting and neutralizing covert surveillance devices. TSCM professionals use specialized equipment to find hidden cameras, microphones, GPS trackers, and other bugs.

What TSCM detects

RF transmitters: Any device that wirelessly transmits (hidden cameras, audio bugs, cellular transmitters) emits radio frequencies. Spectrum analyzers and non-linear junction detectors find these.

Hidden cameras: Pinhole cameras, cameras disguised as everyday objects. Detected using lens reflection detectors (every camera lens reflects light in a characteristic way) and thermal imaging.

Audio bugs: Microphones connected to transmitters or recording devices. Some are passive (no RF emission), requiring physical inspection and thermal analysis.

GPS trackers: Devices transmitting location via cellular networks. Detected using RF scanning and physical vehicle inspection.

Recording devices: Non-transmitting recorders (USB drives, modified objects). Found through physical inspection and non-linear junction detection (finds semiconductor circuits even when powered off).

Network surveillance: Unauthorized access points, packet sniffers, and compromised network equipment. Detected through network analysis.

What a sweep involves

A professional TSCM sweep typically includes:

1. RF spectrum analysis: Scanning all radio frequencies for unauthorized transmissions
2. Physical inspection: Systematic examination of rooms, furniture, fixtures, and electronics
3. Non-linear junction detection: Scanning walls, ceilings, and floors for hidden electronics
4. Thermal imaging: Identifying heat signatures from active electronics
5. Network analysis: Checking for unauthorized devices on the network
6. Telephone line analysis: Testing for wiretaps and modifications
7. Laser/infrared scan: Detecting certain types of eavesdropping devices

What it costs

• Residential sweep: $1,500-$5,000 (one room to full house)
• Corporate office: $5,000-$25,000 (depends on size and classification level)
• Government/classified facility: $10,000-$50,000+
• Executive protection: $2,500-$10,000 per event or travel location

What Symvek is building

Traditional TSCM requires expensive equipment and trained professionals. Much of the basic capability is now reachable with a smartphone and a $30 RTL-SDR dongle:

• WiFi camera detection (scanning for camera-like devices on local networks)
• Bluetooth tracker detection (AirTags, Tile, unknown BLE devices)
• Cell-site simulator detection (anomalous cell tower behavior)
• ISM band scanning (common bug frequencies)

It won’t replace professional TSCM for high-security contexts, but it makes basic counter-surveillance accessible to anyone.

Start with understanding your area’s fixed surveillance on Sentinel.