Cell Phone Location Privacy
Schneier on Security
JANUARY 15, 2021
It protects users from fake cell phone towers (IMSI-catchers) and surveillance by cell providers. Monthly: The user pays their bill to the MVNO (credit card or otherwise) and the phone gets anonymous authentication (using Chaum blind signatures) tokens for each time slice (e.g., It’s a clever system. All MVNO SIMs are identical.
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