SITR/SHAKEN implementation in effect today (June 30 2021)

Michael Thomas mike at
Fri Jul 9 23:36:21 UTC 2021

On 7/9/21 3:44 PM, Keith Medcalf wrote:
>> On Friday, 9 July, 2021 16:32, K. Scott Helms wrote:
>> Robocalls really aren't a product of the legacy PSTN.  Today almost none
>> of them originate from anywhere but VOIP.  Now, you can certainly say
>> that if SS7 had robust authentication mechanisms that we could then trust
>> caller ID (more) but there's no sign of us abandoning the PSTN anytime
>> soon.  Having said that, there's any number of protocols we rely on today
>> that have the exact same gap.  BGP is arguably even worse than SS7.
> The root of the problem is that the "Caller ID" is not a "Caller ID".  If there were a requirement for "truth in advertizing" it would properly be called the "Caller Advertizement" because it is primarily intended as an advertizement by the caller, and not an ID of the caller.
The assumption back around 2004 was that P-Asserted-ID would be an old 
boys network to the end and get told to buzz off when I complained that 
it wouldn't. This was trivially foreseeable  back then and it played it 
the most ridiculously foreseeable way.


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