phc-discussions - Re: [PHC] A (naively?) simple PHC submission using hash chains

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Date: Wed, 7 Aug 2013 01:05:35 -0600
From: Jeffrey Goldberg <Jeffrey@...dmark.org>
To: discussions@...sword-hashing.net
Subject: Re: [PHC] A (naively?) simple PHC submission using hash chains

On Aug 6, 2013, at 10:06 PM, Tony Arcieri <tony.arcieri@...il.com> wrote:

> This approach seemed fun to me and I'd like to know what problems it has.

In your example, you set hash to be HMAC-SHA256. What requirements on hash are there? I would suspect that simply SHA-n would be insufficient, and the use of HMAC here is crucial. Is that correct?

Cheers,

-j