An IMSI-catcher is an eavesdropping device used for intercepting mobile phone traffic and tracking movement of mobile phone users.
Search our growing database on IMSI Catcher technology and sightings.
Have a question? Ask or enter a search term.
IMSI Catchers are all over the news at the moment. Everyone has an opinion to give.
Frequently Asked Questions
All the answers to the questions you couldn’t find anywhere else.
A list of known IMSI Catchers. User submissions welcome.
Ready-to-wear Counter-surveillance Gear
How surveillance destroys privacy
What is the Electronic Communications Privacy Act?
How Cell Towers Work
IMSI Catchers: Practical Knowledge for Activists
Spy vs Spy Goes Mobile
Practical Cellphone Spying
Cell Site Simulators
Karsten Nohl: Mobile self-defense