Re: [Tm-rid] HHIT trust proof for Auth messages

Michael Richardson <mcr@sandelman.ca> Wed, 02 October 2019 21:31 UTC

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From: Michael Richardson <mcr@sandelman.ca>
To: "Wiethuechter, Adam" <adam.wiethuechter@axenterprize.com>
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Date: Wed, 02 Oct 2019 17:31:03 -0400
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Subject: Re: [Tm-rid] HHIT trust proof for Auth messages
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Wiethuechter, Adam <adam.wiethuechter@axenterprize.com> wrote:
    > Assuming we want to run Reed-Solomon (and to my knowledge after doing some
    > internet search to understand it) we want an RS(92,69) with 8 bit symbols.
    > This will give us 23 bytes of parity that we would place into the "payload"
    > section and would protect the 3 signature pages from up to 11 errors. This
    > is assuming the following: RS(n,k) and 2t=n-k where; n=payload size, k=data
    > size, t=correctable errors. I used [1] as a reference to understand what I
    > was doing.

That's not enough.
You have to be able to recover from more than 11 errors; but 23 bytes worth
of errors in the form a missing packet.

RAID-4 can do this on a 3:1 basis.

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