Counter-Surveillance Gear Guide
Counter-surveillance gear helps you find hidden cameras, bugs and trackers and keep your devices from leaking information. This guide explains what each type of device does, what it cannot do and what the law allows in Canada. It covers protection only, never spying on others.
Our principle
Types of counter-surveillance gear
Scan for radio signals from hidden transmitters, GPS trackers that report over cellular networks and wireless cameras. Good detectors let you adjust sensitivity and filter out Wi-Fi and phones. They work best in a quiet radio environment with your own devices switched off.
Limit: Cannot find devices that record locally or are switched off
Use flashing red LEDs viewed through a filter: a camera lens reflects the light back as a bright glint. Cheap, simple and effective at finding cameras in rooms, rentals and change areas.
Limit: You have to sweep slowly and look at every surface
Most commercial trackers report over cellular networks, which RF detectors can pick up when they transmit. Bluetooth trackers such as AirTags are detected by your phone: iPhones from iOS 17.5 and Android phones from version 6.0 warn you about unknown trackers travelling with you.
Limit: Trackers that only transmit occasionally are hard to catch; check physically too
Shielded pouches that block cellular, Wi-Fi, Bluetooth and GPS signals, so a phone or key fob inside cannot transmit. Useful for travel, keyless-car theft protection and preserving evidence.
Limit: Your phone receives nothing while inside
Simple slide covers stop cameras from seeing anything if a device is compromised. Some laptops include hardware camera switches.
Limit: Microphones still need software controls
Adapters that pass power but block data lines, protecting your phone from malicious public charging ports. In 2023 the FBI warned against using free public USB charging stations.
Limit: Your own charger and a wall outlet are even better
Filters that make laptop and phone screens unreadable from the side, protecting against shoulder surfing in public.
Limit: Slightly dims the screen
Technical surveillance countermeasures (TSCM) professionals use spectrum analyzers, thermal cameras and non-linear junction detectors that find electronics even when switched off. If the stakes are high, hire a qualified professional.
Limit: Expensive and needs training
Where to buy
Our #1 affiliate partner, Spy Associates, sells counter-surveillance equipment including bug detectors, hidden camera finders and GPS tracker detectors.
Shop counter-surveillance gear at Spy Associates →
Affiliate link: we may earn a commission at no extra cost to you. See our affiliate disclosure.
How to sweep a room in 10 minutes
- 1. Look first
Check smoke detectors, clocks, chargers, outlets, air vents, picture frames, plants and anything pointing at the bed, shower or desk.
- 2. Turn off the lights
Use a lens finder or your phone’s flashlight to look for small reflections from camera lenses.
- 3. Scan for signals
Turn off your own devices, then sweep slowly with an RF detector, closer to suspicious objects.
- 4. Check the network
List devices on the Wi-Fi network and look for unknown cameras.
- 5. Document and report
If you find a device, photograph it without touching it and contact the police or the property owner.
The law in Canada
- Jammers are illegal. Under the Radiocommunication Act, it is prohibited to install, use, possess, manufacture, import, distribute, lease, offer for sale or sell a signal jammer in Canada. Individuals face penalties of up to $25,000 for a first violation and $50,000 for later ones, businesses up to $10 million, and the equipment can be seized.
- Interception devices are restricted. Section 191 of the Criminal Code makes it an offence to possess, sell or buy a device knowing that its design makes it primarily useful for secretly intercepting private communications, punishable by up to two years in prison.
- Detection is legal. Detecting and blocking surveillance of yourself, for example with an RF detector, lens finder or Faraday bag, is lawful.
This is general information, not legal advice. Laws differ in other countries.
If you think you are being watched by someone you know
Hidden trackers and stalkerware are often tools of abuse. Removing a device can alert the person who placed it, so make a safety plan with a support worker first, and call 911 if you are in danger. See the tracking and stalkerware section of The Privacy Page.
Latest surveillance and spyware news
- A Privacy Company Just Saved the Clearest Flock Surveillance Map I’ve SeenCNET ·
- Watching the watchers — the Mother City’s expanding surveillance network demands voyeurism scrutinyDaily Maverick ·
- Introducing Our New Surveillance Self-Defense Guide: Online Privacy for Parents and YouthEFF Updates ·
- EFF’s State Legislative Agenda to End ALPR Mass SurveillanceEFF Updates ·
- US Park Police spend $343,000 on mobile surveillance cameras in Washington DCThe Guardian: surveillance ·
- AI ‘supercharging’ surveillance of Australian workersBing News: workplace surveillance ·
- uCreator: virtualization-based Android spyware platform targeting WeChat, Telegram and other messaging apps/r/netsec ·
- Clotty The Custom Period Tracker Can, Of Course, Run DOOMHackaday ·
More live news on News Matrix →
Questions
Do bug detectors really work?
RF detectors find devices that are actively transmitting. They will not find devices that record locally or are switched off, so combine them with a careful visual search and a lens finder.
Are signal jammers legal in Canada?
No. Using, possessing, selling or importing a jammer is prohibited under the Radiocommunication Act.
How do I find an AirTag or tracker on me?
Modern iPhones and Android phones alert you to unknown Bluetooth trackers moving with you and let you play a sound to find them. For cellular GPS trackers, use an RF detector and check vehicles physically.
When should I hire a professional?
If you are a business with sensitive information, a public figure or at serious risk, hire a qualified TSCM professional with specialised equipment.
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Topics: counter-surveillance gear, bug detector, RF detector, hidden camera detector, GPS tracker detector, Faraday bag, webcam cover, USB data blocker, privacy screen, TSCM, jammers illegal Canada, Spy Associates