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Re: [GNUnet-developers] EcDSA signature scheme


From: hyazinthe
Subject: Re: [GNUnet-developers] EcDSA signature scheme
Date: Sun, 12 Aug 2018 18:44:10 +0200

News on the PQ site of things - at least worth it to keep an eye on:
Whonix includes Codecrypt by default now - 
https://www.whonix.org/wiki/PQCrypto#Use_Instructions .
Codecrypt is a GnuPG-like unix program for encryption and signing that uses 
only quantum-computer-resistant algorithms. It's Free Software using "GNU 
LGPLv3 or later" license, which is good. Codecrypt git: 
https://gitea.blesmrt.net/exa/codecrypt


Greetings,
Bastian Schmidt

--- Urspr√ľngliche Nachricht ---
Von: <address@hidden>
Datum: 14.07.2018 11:00:50
An: Bernd Fix <address@hidden>
Betreff: Re: [GNUnet-developers] EcDSA signature scheme

> *Disclaimer: I'm not skillful in cryptography. I hope you can tolerate random
> input with intention to help GNUnet crypto in general. I hope that the input
> is helpful in any case and sorry if the input is not helpful in any case.
> More eyes see more. Sometimes also including the unskillful ones.*
>
> When it comes to double application/hashing after the 1st round of it one
> should do "Xor" or in other words 'push down a bit/swap a bit/change
> a bit'
>
> Nonce always have to be different and in being so unique - without any 
> exception.
>
> What crypto in general to use:
> 1. MRAE - (nonce)-misuse-resistant-authenticated-encryption:
> Especially RIV - Robust Initialization Vector - 
> https://www.researchgate.net/publication/305421597_RIV_for_Robust_Authenticated_Encryption
> otherwise SIV - Synthetic Initialization Vector
> But the downside of it is that it's slow/effortful, because it has to go
> over cleat text for 2 times
> So, this crypto is not suitable for realtime applications/streaming
> But it's the most secure crypto.
> 2. Robust authenticated encryption:
> If one is dealing with realtime applications/streaming, one should go down
> one step
> from MRAE to this Robust authenticated encryption.
> Especially POET is a good choice, that's the successor generation of McOE-G.
> Otherwise McOE-G or maybe COLM is a good pick.
> That's the 2nd most secure crypto.
>
> But in times of quantum computers - by 2018 NSA could have a decent one
> - it's probably better to increasingly consider Post-Quantum Cryptography
> (PQCrypto), because then ECDSA and ECDH are also no longer secure anymore.
> I found this page to be useful for overview: 
> https://www.whonix.org/wiki/PQCrypto
> .
> For more details this page is very good: https://pqcrypto.org/
> Did you know that the TOR project planned to migrate to quantum resistant
> ciphers by version 0.2.9.x ( 
> https://trac.torproject.org/projects/tor/ticket/17286
> + https://trac.torproject.org/projects/tor/ticket/24985 ) ? But my impression
> is, that they've done the fatal mistake to postpone this to a far, far, 
> undefined
> point in the future.
>
>
> Greetings,
> Bastian Schmidt
>
> --- Urspr√ľngliche Nachricht ---
> Von: Bernd Fix <address@hidden>
> Datum: 13.07.2018 11:26:44
> An: address@hidden
> Betreff: Re: [GNUnet-developers] EcDSA signature scheme
>
> > I think that most problems mentioned in my previous post originate in
> > the '#define CURVE "Ed25519"' statement at curve_ecc.c:37.
> All
> > key
> > parameter definitions (EdDSA, ECDSA and ECDHE) use that value leading
> to
> >
> > the described problems. I think that the curve key parameter needs to
> be
> >
> > set individually for each purpose.
> >
> > I have created a new branch "new_crypto" to collect the changes
> > I see
> > fit for the EC crypto stuff. I hope to be able to push it later today
> > (if not, I will not be able to do so before next Wednesday).
> >
> > As more changes in crypto are pending (iirc it was mentioned that the
> > timestamp will be removed from the HMAC computation), we could collect
> > these changes in that new branch.
> >
> > Any suggestions or comments?
> >
> > _______________________________________________
> > GNUnet-developers mailing list
> > address@hidden
> > https://lists.gnu.org/mailman/listinfo/gnunet-developers
> >
>
>
>
> _______________________________________________
> GNUnet-developers mailing list
> address@hidden
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