MIS 0855 Chapter Notes - Chapter 2.1: Cellular Network, International Mobile Subscriber Identity, International Mobile Station Equipment Identity
23 May 2018
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What the NSA Wants to Know About Your Phone Calls (Di Justo)
• NSA collects all call records from Verizon, AT&T, and Sprint
• Deaded that Veizo had oe its telephoy etadata; asked fo eey all oigiatig i
the US, originating and terminating telephoe ues, eah phoe’s iteatioal ID, loatio
of calls, calling-card numbers, and time and duration of call
• Originating and terminating telephone numbers of each call is powerful information
• Simple fact that a call was placed between two numbers is admissible in court, even when the
content of the call is unknown
• Cellula etok = tuked syste; alles liked though a seies of high-capacity channels to
provide location of call
• A phoe’s Iteatioal Moile Euipet Idetity IMEI is a unique number indicating where
the phoe as aufatued, aufatue’s ake ad odel ode, ad the idiidual phoe’s
serial number
• IMEI can be used to identify malfunctioning, obsolete, or stolen equipment, or a ban from the
network
• A phoe’s Iteational Mobile Subscriber Identity (IMSI) uniquely identifies a user by using the
SIM card
• Calling card can be used to mask the originating number of a phone call
• Metadata can be used to:
o Determine whether multiple people were together in a particular place
o Track the movements of a device
o Evoke the breadth and depth of the connections between people
o Identify names behind the numbers
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