TELECOM Digest OnLine - Sorted: Spoofing Caller Party With Custom Equipment

Spoofing Caller Party With Custom Equipment

rsn (techbaath@yahoo.com)
14 Nov 2004 06:15:03 -0800

Hello,

I am wondering what prevents someone from spoofing the phone number?
If we built a modified GSM modem +SIM type capability that took the
phone number and MSIDN and any other relevant ids as input would'nt
you be able to call/SMS on someone else's id? (Assume for the moment
that their phone is switched off and hence there is no conflict on the
network).

There is probably some defence built into the system, just wanted to
know how this works.

Thanks,

tb

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