Finding Hidden Wireless Cameras
Hidden cameras in rental accommodations, hotel rooms, changing rooms, and bathrooms are a documented problem. Here’s how to check for them using tools you already have.
WiFi network scan
Method: Most hidden WiFi cameras create their own network or join the local WiFi. Scanning the local network reveals connected devices.
On iPhone: Use Fing app (free) to scan the local network On Android: Use Fing or Network Scanner
What to look for: Devices with manufacturer names like Hikvision, Dahua, Amcrest, Wyze, or generic names like “camera” or “IPcam.” Unknown devices with web server ports (80, 443, 554 for RTSP video) are suspicious.
RF detection
Method: Some cameras transmit on non-WiFi frequencies. An RF detector can find transmissions in the 1-6 GHz range.
Tools: Consumer RF detectors ($20-50 on Amazon). Professional ones cost more but are more sensitive.
How to use: Sweep the room slowly. The detector alerts when it detects RF emissions. Check near power outlets, smoke detectors, clocks, and air fresheners (common camera hiding spots).
Infrared detection
Method: Most cameras with night vision use IR LEDs that are invisible to the naked eye but visible to a phone camera.
How to use: Turn off all lights. Open your phone’s front camera (rear cameras often have IR filters). Slowly scan the room. IR LEDs appear as visible bright spots on your screen.
Physical inspection
Common hiding spots:
- Smoke detectors (especially non-functional ones)
- Clock faces (especially digital clocks)
- USB chargers and power adapters
- Air fresheners and tissue boxes
- Screws or bolts with unusual centers (pinhole cameras)
- Picture frames and decorative items
- Bathroom vents and fans
- Mirrors (one-way mirror test: place your finger on the mirror; if there’s a gap between your finger and its reflection, it’s a regular mirror; if they touch, it may be one-way)
What Symvek is building
Automating this is tractable: scan the local network and nearby RF frequencies for camera-like devices, and surface what does not belong. The techniques below are what such a scan would automate.
Until then, the manual methods above catch most consumer-grade hidden cameras. Professional-grade covert cameras require professional TSCM equipment.
Check Sentinel for known camera infrastructure near your location.