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Re: [Suit] COSE_Sign vs. COSE_Mac

"Thomas C. Schmidt" <t.schmidt@haw-hamburg.de> Mon, 04 June 2018 20:18 UTC

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From: "Thomas C. Schmidt" <t.schmidt@haw-hamburg.de>
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Date: Mon, 04 Jun 2018 22:18:32 +0200
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Subject: Re: [Suit] COSE_Sign vs. COSE_Mac
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Hi Koen,

On 04/06/2018 17:59, Koen Zandberg wrote:

> My 2 cents for this scenario: the device I'm currently developing for
> (samr21-xplained pro) takes around 8 seconds for ed25519 signature
> verification (TweetNaCl implementation). 

Could this work be significantly flawed?

We've done the same Edwards curve on the same board with RIOT for 
SIGCOMM '15 and an ID-based authentication scheme: 3 sec verification, 1 
sec generation.

See https://conferences.sigcomm.org/sigcomm/2015/pdf/papers/p603.pdf

It could be much faster when optimized in assembly code.

Cheers,
  Thomas
-- 

Prof. Dr. Thomas C. Schmidt
° Hamburg University of Applied Sciences                  Berliner Tor 7 °
° Dept. Informatik, Internet Technologies Group   20099 Hamburg, Germany °
° http://inet.haw-hamburg.de/members/schmidt      Fon: +49-40-42875-8452 °

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