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Content type: Explainer
What is an IMSI catcher?
‘IMSI’ stands for ‘international mobile subscriber identity’, a number unique to your SIM card. IMSI catchers are also known as ‘Stingrays’.
An ‘IMSI catcher’ is a device that locates and then tracks all mobile phones that are connected to a phone network in its vicinity, by ‘catching’ the unique IMSI number.
It does this by pretending to be a mobile phone tower, tricking mobile phones nearby to connect to it, enabling it to then intercept the data from that phone…
Content type: Report
Privacy International has released a report summarising the result of its research into the databases and surveillance tools used by authorities across the UK’s borders, immigration, and citizenship system.
The report uses procurement, contractual, and other open-source data and aims to inform the work of civil society organisations and increase understanding of a vast yet highly opaque system upon which millions of people rely.
It also describes and maps…