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Re: [Cfrg] Answers to HKDF questions

Zooko Wilcox-O'Hearn <zooko@zooko.com> Thu, 22 October 2009 03:01 UTC

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From: Zooko Wilcox-O'Hearn <zooko@zooko.com>
Date: Wed, 21 Oct 2009 21:01:16 -0600
To: Hugo Krawczyk <hugo@ee.technion.ac.il>
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Subject: Re: [Cfrg] Answers to HKDF questions
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Dear Hugo Krawcyck:

Thank you for the detailed answers.  I still have a question about  
HMAC as compared to other MACs.  Feel free to point me to existing  
documents if they answer my question.  Suppose I were to instantiate  
HKDF with the keyed PRF being a cipher based MAC such as Poly1305  
instead of HMAC.  Which of the arguments for HKDF's security would  
still apply?

Regards,

Zooko

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