Guys, This question might be a bit off-topic, so please bear with me as i could hardly find a better place to solicit some help. I suspect caller authentication can be challenging in the broader context of VoIP/SIP. Now, if we restrict the set of calls to those coming from the GSM network, is there a way to tell if the Caller Id is coming from the right source? It doesn't need to be a bulletproofed solution. For instance, if i can already say that a given call is certainly coming from a GSM network (and that the call metadata weren't tampered with), i could maybe rely on the GSM authentication mechanism. Any idea? Max.
Hi Max, I think that the answer is generally no - for example, I'm trivially easily able to place a call to my GSM phone with any CLI that I choose. If you can work around that, then consider the case where I divert my GSM phone to you - the call to you will come from the GSM network, but I can still set an arbitrary CLI. Cheers -- Dave
Guys,
This question might be a bit off-topic, so please bear with me as i could hardly find a better place to solicit some help. I suspect caller authentication can be challenging in the broader context of VoIP/SIP. Now, if we restrict the set of calls to those coming from the GSM network, is there a way to tell if the Caller Id is coming from the right source? It doesn't need to be a bulletproofed solution. For instance, if i can already say that a given call is certainly coming from a GSM network (and that the call metadata weren't tampered with), i could maybe rely on the GSM authentication mechanism.
Any idea? Max.
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participants (2)
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David Knell
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Max Bridgewater