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Date: Sat, 22 Mar 2014 21:21:37 -0400
From: Bill Cox <>
Subject: Re: [PHC] Can I have two entries?

On Sat, Mar 22, 2014 at 8:21 PM, Solar Designer <> wrote:
> On Fri, Mar 21, 2014 at 08:37:30AM -0400, Bill Cox wrote:
>> My TwoCats password hashing scheme is a lot of fun, and I am beginning
>> to think it can compete with other good full-featured schemes.
>> However, it's complexity is it's biggest drawback.  For guys who just
>> want some simple memory hashing, and don't need all the security
>> features I included TwoCats, a simple KISS memory hashing function
>> might be better.
> Good idea.
>> Is it a problem if I make two submissions?  The second would be  a
>> tiny stripped down version of TwoCats with only a memory size
>> parameter.  Maybe SkinnyCat, or some such thing, though both my cats
>> are on the heavy side.
> It's OK to make two submissions, but the reason you give is not good
> enough for that, in my opinion.  Instead of making two submissions, can
> you define TwoCats and SkinnyCat such that SkinnyCat can be computed
> with TwoCats?  That way, SkinnyCat will be an implementation of a subset
> of the functionality of TwoCats, and it can be part of the same
> submission.  Just a cut-down implementation included in the submission,
> and maybe also a second specification document for the cut-down version.
> That said, in case we'd happen to want to include SkinnyCat but not
> TwoCats in the PHC portfolio, I'm not sure how we'd approach that if
> it's not submitted separately.  I guess we'd ask you to package it
> separately at that time.
> What do others think?
> Alexander

Sounds good to me, though I still have work to do on TwoCats and the
deadline is close!


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