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A comment on EFF Files FOIA Suit Over U.S. Marshals’ Cell-Tracking Spy Planes. Parent comment

Re:EFF Files FOIA Suit Over U.S. Marshals’ Cell-Tracking Spy... by ta75757 on Tuesday February 10, 2015 @07:37PM (#9030872)
It is theoretically possible to avoid that via cryptography but I doubt the cell phone protocols include that.
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Re:EFF Files FOIA Suit Over U.S. Marshals’ Cell-Tracking Spy... by schoen on Tuesday February 10, 2015 @08:32PM (#9031104)
3G provides some cryptographic basis for this, but you might not have a UI on your device to require 3G or to warn you about roaming (which could defend at least against early generations of IMSI catchers).
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