Re: [bitcoin-dev] SHA1 collisions make Git vulnerable to attakcs by third-parties, not just repo maintainers

From: Ethan Heilman <eth3rs@gmail•com>
To: Pieter Wuille <pieter.wuille@gmail•com>,
	 Bitcoin Protocol Discussion
	<bitcoin-dev@lists•linuxfoundation.org>
Cc: Steve Davis <steven.charles.davis@gmail•com>
Subject: Re: [bitcoin-dev] SHA1 collisions make Git vulnerable to attakcs by third-parties, not just repo maintainers
Date: Sat, 25 Feb 2017 17:34:38 -0500	[thread overview]
Message-ID: <CAEM=y+XEXuf+BPOH0h=Hn3_9PeL4Dv9G3ySN6fe5zH7bJVkSDA@mail.gmail.com> (raw)
In-Reply-To: <CAPg+sBhZ1UqOLqz_PVjjrE8Cbte_Y160Gq7P7EWf6cRKjMcDEQ@mail.gmail.com>

[-- Attachment #1: Type: text/plain, Size: 1412 bytes --]

I strongly encourage Bitcoin to move from 80-bit collision resistance
(RIPEMD-160) to 128-bit collision resistance (SHA-256).

On Sat, Feb 25, 2017 at 5:14 PM, Pieter Wuille via bitcoin-dev <
bitcoin-dev@lists•linuxfoundation.org> wrote:

>
>
> On Feb 25, 2017 14:09, "Steve Davis via bitcoin-dev" <bitcoin-dev@lists.
> linuxfoundation.org> wrote:
>
> Hi Peter,
>
>
> I really, really don’t want to get into it but segwit has many aspects
> that are less appealing, not least of which being the amount of time it
> would take to reach the critical mass.
>
> Surely there's a number of alternative approaches which could be explored,
> even if only to make a fair assessment of a best response?
>
>
> Any alternative to move us away from RIPEMD160 would require:
> * A drafting of a softfork proposal, implementation, testing, review.
> * A new address format
> * Miners accepting the new consensus rules
> * Wallets adopting the new address format, both on the sender side and
> receiver side (which requires new signatures).
>
> I.e., exactly the same as segwit, for which most of these are already
> done. And it would still only apply to wallets adopting it.
>
> --
> Pieter
>
>
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists•linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>
>

[-- Attachment #2: Type: text/html, Size: 2884 bytes --]