phc-discussions - Re: [PHC] Maximising Pseudo-Entropy versus resistance to Side-Channel Attacks

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Message-ID: <CAOLP8p4Hc6wtzhXfE8pPqhFeT7_bFsqHtyvcgZpY1RraVC4qBg@mail.gmail.com>
Date: Wed, 6 May 2015 09:18:42 -0700
From: Bill Cox <waywardgeek@...il.com>
To: "discussions@...sword-hashing.net" <discussions@...sword-hashing.net>
Subject: Re: [PHC] Maximising Pseudo-Entropy versus resistance to Side-Channel Attacks

It looks like real password entropy may be even lower than what I found
when trying to compress passwords.  This paper
<http://www.jbonneau.com/doc/B12-IEEESP-analyzing_70M_anonymized_passwords.pdf>
suggests the median password entropy of Yahoo users is only 21.6 bits!

The utility of an additional 6.64 bits seems pretty important to me.

Bill

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