TOP SECRET STRAP 1
Where are these keys?

Keys live on the SIM card in the phone

They also need to be present on the mobile
network; are kept carefully protected in the core
network

 

 

 

 

 

 

 

 

 

 

 

 

 

 

the
Internet
4"

3"
core of mobile 4? p- landline
network network
hone
base 
station

 

 

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