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Am 12.07.2017 um 21:37 schrieb Jerry Leichter:
<br>
<br>
<blockquote type="cite" style="color: #000000;">
<blockquote type="cite" style="color: #000000;">The issues with
trusting electronic hardware have become so intractable
<br>
that for some applications it seems that building mechanical
cipher
<br>
hardware should be reevaluated.
<br>
<br>
No, I am not joking. <span class="moz-smiley-s2" title=":-("></span>
<br>
<br>
No significant bandwidth, no easily automated integration with
anything,
<br>
not really applicable to any type of data except text,
absolutely
<br>
doesn't do public-key encryption ... and is absolutely the only
thing
<br>
you know isn't deliberately manufactured to be electronically
broken on
<br>
demand.
<br>
</blockquote>
Who's going to write the first paper on attacking such a device
through power analysis of the sounds it makes as it runs?
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</blockquote>
One could also use diverse combinations of hand ciphers and/or
mechanical ciphers.
<br>
For sufficiently small message volumes (and hence efficiency is also
unlikely to be
<br>
a bottleneck) they could be extremely secure IMHO.
<br>
<br>
M. K. Shen
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