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GPRS Security Conclusion
Spoofing from a mobile is impossible unless you can forge GPRS radio traffic
GPRS, from a security point of view, is an open tunnel from mobile to the operator IP backbone
- i.e. From the Internet to the operator backbone !
GGSN is the first routing element, it is also the only security element to protect the operator
The roaming process needs to be secured to prevent and detect attacks from other operators