Security News > 2021 > January > Cell Phone Location Privacy

We all know that our cell phones constantly give our location away to our mobile network operators; that's how they work.

"Pretty Good Phone Privacy" protects both user identity and user location using the existing cellular networks.

It protects users from fake cell phone towers and surveillance by cell providers.

One-time setup: The user's phone gets a new SIM from the MVNO. All MVNO SIMs are identical.

Monthly: The user pays their bill to the MVNO and the phone gets anonymous authentication tokens for each time slice in the coming month.

The user's traffic is sent to the MVNO gateway and then out onto the Internet, potentially even using a VPN. All connectivity is data connectivity in cell networks today.

News URL

https://www.schneier.com/blog/archives/2021/01/cell-phone-location-privacy.html