phc-discussions - Re: [PHC] How important is salting really?

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Message-ID: <CAMtf1HvAdPax=pDYDvxQcL5RQ2va5SUO-OfSHFrz=Vj2c_Gpiw@mail.gmail.com>
Date: Sat, 13 Dec 2014 13:19:38 +0800
From: Ben Harris <ben@...rr.is>
To: discussions@...sword-hashing.net
Subject: Re: [PHC] How important is salting really?

On 13 December 2014 at 11:00, Steve Thomas <steve@...tu.com> wrote:

>
> P.S. MD5("deliciously-salty-" || pw) is from an infamous article that gets
> salt
> wrong :). It's near the top of Google when searching for rainbow tables.
>

Joking aside, if you have a unique "deliciously-salty-", truncate the MD5
to 24 bits, and implement a good rate limiting system you'd probably have a
pretty secure system. Good enough against online attacks, but not so good
that you are giving up someone's password if you leak hashes. [weak
passwords are still weak, and leaks from multiple sources for the same UID
would eventually give up a password]

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