Hi
I wonder if there is a way to develop a Denial of Service or Conditional Access system for
a GSM network based on Osmocom. The idea is to develop a commercial product intended to be
used to limit unlawful communication in prisons or correctional facilities. My
investigation is that this is a kind of worldwide necessity as inmates use smuggled mobile
phones for criminal activities (I live in Central America and constantly see news that
confirm this is urgent requirement). Currently there a few options available to achieve
this purpose:
1. Government authorities require telecom operators to reduce radio signal in the vicinity
of confinement facilities2. The use of radio jamming systems to propagate a noise signal3.
One or two commercial solutions like iNAC Managed Access from Tecore (a very clever and
patented technology)
I imagine a solution based on Osmocom as a base station simulating a roaming area in the
correctional facility area, for authorized users, dummy network should appear as a FPLMN
but for illegal users the fake network must grant access entering driving them into a dead
end network with no communication. However I see there are several flaws for this aproach:
one is that inmates could set their mobiles to manual network selection and connect
themself to commercial mobile networks but I hope this could serve as a ground for further
discussion. I will appreciate very much your comments. Regards,
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