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<div class="moz-cite-prefix">On 10/21/17 9:37 PM, Jon Callas wrote:<br>
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cite="mid:1938D986-1A84-4884-A0E0-8ECDFA36624A@callas.org">
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<pre wrap="">On Oct 21, 2017, at 7:24 PM, John Levine <a class="moz-txt-link-rfc2396E" href="mailto:johnl@iecc.com"><johnl@iecc.com></a> wrote:
I was talking to a guy at a conference who sells a package which,
among other things, encrypts files in cloud storage with each file
having a different key. The keys are all generated from a secret
keystore seed in a way that is supposed to be secure.
I'm looking at his patent on the technique and can't tell whether it's
clever, or just overclever:
<a class="moz-txt-link-freetext" href="https://patents.google.com/patent/US9703979B1/">https://patents.google.com/patent/US9703979B1/</a>
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I know this sounds bad, but it does not behoove anyone who is an expert in the field to read someone else's patents. The reason is simple – knowing infringement is triple damages.
I can think of about ten ways to do this securely. If he invented an eleventh, I'd rather just award a golf clap from afar.
Jon</pre>
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<p>(i had to look up "golf clap")<br>
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<p>i fell asleep halfway through reading the patent, before they got
to the good part. (blade runner 2049 caused the same effect.)<br>
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<p>but this citation referencing prior art was amusing:</p>
<p>"In some currently available security protocols, including PGP
(see Z. Philip, <i class="style-scope patent-text">PGP Source
Code and Internals</i>. MIT Press, 1995)" [...]</p>
<p>(sure enough, rav google tells me a number of other papers and
another of his patents credit "Z. Philip" with PGP.)</p>
<p>(in fairness, non-chinese have trouble as well distinguishing
chinese surnames from given names).<br>
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