<div id="geary-body" dir="auto"><div>Thank you reply, so any bad actor can't use as example with self sign certificates ? So digital signature must be produced from well known authorized CA certificate key pair ?</div><div><br></div><div>Can you point on one of the well know CA authority which authorized for SHAKEN/STIR.</div><div><br></div><div>volga629 </div><div><br></div><div><br></div></div><div id="geary-quote" dir="auto"><br>On Tue, Dec 3, 2019 at 06:56, Liviu Chircu <liviu@opensips.org> wrote:<br><blockquote type="cite">
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<div class="moz-cite-prefix">On 03.12.2019 03:59, volga629 via Users
wrote:<br>
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<blockquote type="cite" cite="mid:1575338355.3038.7@skillsearch.ca">
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<div><span style="font-variant-ligatures: normal; orphans: 2;
widows: 2;"><span style="font-variant-ligatures: normal;
background-color: rgb(255, 255, 255);">If call from
originator is being replaced by middle with same source
and destination and change Identity header with keys and
certificate location is possible that terminator will
authorize it ?</span></span></div>
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<p><tt>Hi Volga,</tt></p>
<p><tt>Yes, it is perfectly possible to rebuild the Identity header
and re-attribute the<br>
asserted source/destination to yourself. In order to do this,
you only need to own<br>
an officially recognized STIR/SHAKEN X509 cert along with its
private key, issued by<br>
a STIR/SHAKEN certification authority.</tt></p>
<p><tt>So, while this is possible, I don't see why anyone in their
right mind would do it.<br>
Doing so would jeopardize the image of the carrier, putting
their business at risk.<br>
It's similar to how public IP routing in the internet works:
any ISP could MITM any<br>
piece of traffic, yet none do. Or do they? :)</tt></p>
<p><tt>Best regards,<br>
</tt></p>
<pre class="moz-signature" cols="72">--
Liviu Chircu
OpenSIPS Developer
<a class="moz-txt-link-freetext" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a></pre>
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