At 19:15 -0500 on 12/06/2015, Chris Lewis wrote about Re: [Shutup]
Proposed Charter for the "SMTP Headers Unhealt:
On 12/06/2015 04:10 PM, Martijn Grooten wrote:
On Sun, Dec 06, 2015 at 02:59:54PM -0500, Chris Lewis wrote:
I was never so glad as to see something as the wide-scale deployment
of callerid a few years later.
But for Caller ID to work in cases like the one you describe, you
wouldn't need to know the phone number (which often includes the
location) of the caller; a "cryptographic blob" identifying their phone
line would suffice.
The proper analog is "Call Trace". You dial a * code, and the
calling number gets recorded by the telco, but it can only be
retrieved via a LE process (I do not believe it requires a full
search warrant, but, joe-blow citizen certainly can't get it). It
cannot be disabled (but presumably spoofable) by the caller.
The *-code you are referencing is *57 (1157 from a dial phone) and
records the ANI (Call Setup and Routing) information not the
spoof-capable CALLERID information. I think about am not sure that
the information is accurate and can not be spoofed/faked. Note that
the called party must use the code before another call comes in and
the TelCo charges you when you use it.
Here is a Wikipedia article on the code/feature.
https://en.wikipedia.org/wiki/Malicious_caller_identification
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