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Date: Thu, 22 Dec 2016 16:53:20 +0100
From: "Jason A. Donenfeld" <>
To: Hannes Frederic Sowa <>
Cc:, "Theodore Ts'o" <>, 
	Andy Lutomirski <>, Netdev <>, 
	LKML <>, 
	Linux Crypto Mailing List <>, David Laight <>, 
	Eric Dumazet <>, Linus Torvalds <>, 
	Eric Biggers <>, Tom Herbert <>, 
	Andi Kleen <>, "David S. Miller" <>, 
	Jean-Philippe Aumasson <>
Subject: Re: Re: [PATCH v7 3/6] random: use SipHash in
 place of MD5

On Thu, Dec 22, 2016 at 4:51 PM, Hannes Frederic Sowa
<> wrote:
> This algorithm should be a non-seeded algorithm, because the hashes
> should be stable and verifiable by user space tooling. Thus this would
> need a hashing algorithm that is hardened against pre-image
> attacks/collision resistance, which siphash is not. I would prefer some
> higher order SHA algorithm for that actually.

Right. SHA-256, SHA-512/256, Blake2s, or Blake2b would probably be
good candidates for this.

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