[SR-Users] How to get Stir/Shaken certificates

[David Villasmil]

I should say: “forward the header, or the validation result”, either should
be enough.

On Thu, 22 Jul 2021 at 18:14, David Villasmil <
david.villasmil.work at gmail.com> wrote:

> There really is no way of doing what you’re thinking about. STIR/SHAKEN is
> really for calls TO US/Canada numbers. Where all incoming calls should have
> an Identity header which you can then validate. Even incoming international
> calls should in theory include said header as a transit (attestation C)
> source.
>
> You are receiving calls from US/Canada numbers to non-US/Canada numbers.
>
> You could, on the other hand, require your inbound providers to forward
> the identity header and you could then validate it, and act accordingly.
> Whether the providers will do that is another story.
>
>
>
> On Thu, 22 Jul 2021 at 16:52, Oleg Belousov <obelousov at gmail.com> wrote:
>
>> STIR-SHAKEN is currently only applicable for the US and Canada. To be
>> part of it service provider must have an Operating Company Number (OCN)
>> which allows access to NANPA Numbering Resource assignments. That also
>> means (and as per my knowledge/experience) - US/Canadian SPs only sign
>> calls with +1 destination. It is however worth it to check if the identity
>> header is present in calls you receive. If it is here - then you can
>> validate MT calls even not being part of a stir-shaken ecosystem.
>> --
>> obelousov.tel
>>
>>
>> On Thu, Jul 22, 2021 at 4:31 PM Benoît Panizzon <benoit.panizzon at imp.ch>
>> wrote:
>>
>>> Hi
>>>
>>> > You need first to register with STI-PA (Policy Administrator), in
>>> > order to receive a token to obtain further certificates from an
>>> > approved Certification Authority.
>>> > In the US STI-PA is Iconectiv, in Canada - Neustar. Please check that
>>> > link https://authenticate.iconectiv.com/
>>>
>>> Thank you for that link. This is very interesting.
>>>
>>> We receive an increasing number of calls from spoofed US numbers in
>>> Switzerland. Mostly tech support scams. I was pondering if there is a
>>> way to validate them via STIR/SHAKEN.
>>>
>>> We try to filter out invalid +1 prefixes and lengths, but that is a
>>> rather fuzzy thing to do.
>>>
>>> So it would be great, if we could implement STIR/SHAKEN to validate
>>> received calls from the +1 prefix.
>>>
>>> Unfortunately to register for a STI-PA account, only TSP with an
>>> address in he United States are allowed. Do you know if there is a way
>>> to register as a Swiss Ofcom registered TSP?
>>>
>>> (And yes, I am aware that signature signalling also has to be
>>> implemented but we have to start somewhere).
>>>
>>> Hopefully STIR/SHAKEN can in future be deployed on a global level.
>>> Germany and UK would also benefit a lot, seeing also a lot of spoofed
>>> calls with their prefixes.
>>>
>>> --
>>> Mit freundlichen Grüssen
>>>
>>> -Benoît Panizzon- @ HomeOffice und normal erreichbar
>>> --
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> --
> Regards,
>
> David Villasmil
> email: david.villasmil.work at gmail.com
> phone: +34669448337
>
-- 
Regards,

David Villasmil
email: david.villasmil.work at gmail.com
phone: +34669448337
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