Understanding IMSI Catchers: How They Compromise Mobile Privacy and...

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2026-01-02 07:28:54 -

Understanding IMSI Catchers: How They Compromise Mobile Privacy and Security

An IMSI Catcher is a surveillance device used by law enforcement or malicious actors to intercept mobile phone signals. It masquerades as a legitimate cell tower, tricking nearby devices into connecting to it. Once connected, the IMSI Catcher captures the International Mobile Subscriber Identity (IMSI) number, unique to each mobile subscriber. This allows the operator to monitor calls, texts,...

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