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<div class="moz-cite-prefix">On 3/8/22 4:32 PM, Tom Beecher wrote:<br>
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<div dir="ltr">Don't need to break phone to tower encryption when
the vast majority of the call pathway is not encrypted. <br>
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<p>If it's VoLTE I assume it would be sips:</p>
<p>Mike<br>
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<div dir="ltr" class="gmail_attr">On Tue, Mar 8, 2022 at 4:59 PM
Michael Thomas <<a href="mailto:mike@mtcc.com"
moz-do-not-send="true" class="moz-txt-link-freetext">mike@mtcc.com</a>>
wrote:<br>
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<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
Hi, I was reading an article on why Russia hasn't taken out
Ukraine's <br>
mobile networks and one of the premises was that they could
use it to <br>
eavesdrop on calls. Depending on how old their infrastructure
is, that <br>
doesn't make sense as I would assume that along with e2e SIP
that they'd <br>
be using SRTP with the SRTP keys exchanged using DTLS which is
my <br>
understanding of the way they are secured. My understanding
could be <br>
wrong though, or either outdated, or not uniformly deployed.<br>
<br>
The other thing that's weird is that the same article says
they want to <br>
keep it up so they can use their bandwidth too which strikes
me as sort <br>
of a crazy assumption in a war, but that's not much of an
operational issue.<br>
<br>
<a
href="https://www.politico.com/news/2022/03/07/ukraine-phones-internet-still-work-00014487"
rel="noreferrer" target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://www.politico.com/news/2022/03/07/ukraine-phones-internet-still-work-00014487</a><br>
<br>
Mike<br>
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