Editing Secure communication (section)

=== Cellphones ===
Cellphones can easily be obtained, but are also easily traced and "tapped". There is no (or only limited) encryption, the phones are traceable – often even when switched off{{Citation needed|date=August 2009}} – since the phone and SIM card broadcast their International Mobile Subscriber Identity ([[International mobile subscriber identity|IMSI]]). It is possible for a cellphone company to turn on some cellphones when the user is unaware and use the microphone to listen in on you, and according to James Atkinson, a [[counter-surveillance]] specialist cited in the same source, "Security-conscious corporate executives routinely remove the batteries from their cell phones" since many phones' software can be used "as-is", or modified, to enable transmission without user awareness and the user can be located within a small distance using signal [[triangulation]] and now using built in GPS features for newer models. Transceivers may also be defeated by [[Radio jamming|jamming]] or [[Faraday cage]].

Some cellphones ([[Apple Inc.|Apple]]'s [[iPhone]], [[Google]]'s [[Android (operating system)|Android]]) track and store users' position information, so that movements for months or years can be determined by examining the phone.<ref>[https://online.wsj.com/community/groups/question-day-229/topics/how-concerned-you-iphone-tracks?commentid=2388220 Wall Street Journal: How concerned are you that the iPhone tracks and stores your location?]</ref>

The U.S. Government also has access to cellphone surveillance technologies, mostly applied for law enforcement.<ref>Pell, Stephanie K., and Christopher Soghoian. 2014. "Your secret stingray's no secret anymore: The vanishing government monopoly over cell phone surveillance and its impact on national security and consumer privacy." ''Harv. JL & Tech'' 28(1).</ref>