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Message-ID: <CAHmME9or5jdJUCAyY3-L1Wto6LGG9XDvMyhuxiTgTpVgQdWtjw@mail.gmail.com> Date: Thu, 22 Dec 2016 16:53:20 +0100 From: "Jason A. Donenfeld" <Jason@...c4.com> To: Hannes Frederic Sowa <hannes@...essinduktion.org> Cc: kernel-hardening@...ts.openwall.com, "Theodore Ts'o" <tytso@....edu>, Andy Lutomirski <luto@...capital.net>, Netdev <netdev@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>, Linux Crypto Mailing List <linux-crypto@...r.kernel.org>, David Laight <David.Laight@...lab.com>, Eric Dumazet <edumazet@...gle.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Eric Biggers <ebiggers3@...il.com>, Tom Herbert <tom@...bertland.com>, Andi Kleen <ak@...ux.intel.com>, "David S. Miller" <davem@...emloft.net>, Jean-Philippe Aumasson <jeanphilippe.aumasson@...il.com> 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 <hannes@...essinduktion.org> 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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