public inbox for bitcoindev@googlegroups.com
 help / color / mirror / Atom feed
From: Erik Aronesty <erik@q32.com>
To: vjudeu <vjudeu@gazeta.pl>,
	 Bitcoin Protocol Discussion
	<bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] An alternative to BIP 32?
Date: Fri, 19 Mar 2021 21:32:46 -0400	[thread overview]
Message-ID: <CAJowKg+DHsJR4eeHbYgwe79C-U9WZ1-iUyxNLxw9EfD6mQQLBw@mail.gmail.com> (raw)
In-Reply-To: <125859088-3f93e6aca40d5c3244243540270cdb84@pmq7v.m5r2.onet>

use sha3-256.  sha256 suffers from certain attacks (length extension,
for example) that could make your scheme vulnerable to leaking info,
depending on how you concatenate things, etc.  better to choose
something where padding doesn't matter.

On Fri, Mar 19, 2021 at 7:28 PM vjudeu via bitcoin-dev
<bitcoin-dev@lists.linuxfoundation.org> wrote:
>
> I recently found some interesting and simple HD wallet design here: https://bitcointalk.org/index.php?topic=5321992.0
> Could anyone see any flaws in such design or is it safe enough to implement it and use in practice?
> If I understand it correctly, it is just pure ECDSA and SHA-256, nothing else:
>
> masterPublicKey = masterPrivateKey * G
> masterChildPublicKey = masterPublicKey + ( SHA-256( masterPublicKey || nonce ) mod n ) * G
> masterChildPrivateKey = masterPrivateKey + ( SHA-256( masterPublicKey || nonce ) mod n )
>
> Also, it has some nice properties, like all keys starting with 02 prefix and allows potentially unlimited custom derivation path by using 256-bit nonce.
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev


  reply	other threads:[~2021-03-20  1:32 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-19 19:46 [bitcoin-dev] An alternative to BIP 32? vjudeu
2021-03-20  1:32 ` Erik Aronesty [this message]
2021-03-20  2:08   ` Arik Sosman
2021-03-22 12:05     ` Erik Aronesty
2021-03-20 10:08 ` Tim Ruffing
2021-03-20 20:25 vjudeu
2021-03-20 20:25 vjudeu
2021-03-21 21:45 ` Tim Ruffing
2021-03-22  7:51 vjudeu

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=CAJowKg+DHsJR4eeHbYgwe79C-U9WZ1-iUyxNLxw9EfD6mQQLBw@mail.gmail.com \
    --to=erik@q32.com \
    --cc=bitcoin-dev@lists.linuxfoundation.org \
    --cc=vjudeu@gazeta.pl \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox