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Date: Sun, 11 Jun 2017 11:13:01 +0300
From: Kalle Valo <>
To: "Jason A. Donenfeld" <>
Cc:,,  Anna Schumaker <>,  David Howells <>,  David Safford <>,  "David S. Miller" <>,  Gilad Ben-Yossef <>,  Greg Kroah-Hartman <>,  Gustavo Padovan <>,  "J. Bruce Fields" <>,  Jeff Layton <>,  Johan Hedberg <>,  Johannes Berg <>,  Marcel Holtmann <>,  Mimi Zohar <>,  Trond Myklebust <>,,,,,
Subject: Re: [PATCH 0/6] Constant Time Memory Comparisons Are Important

"Jason A. Donenfeld" <> writes:

> Whenever you're comparing two MACs, it's important to do this using
> crypto_memneq instead of memcmp. With memcmp, you leak timing information,
> which could then be used to iteratively forge a MAC.

Do you have any pointers where I could learn more about this?

Kalle Valo

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