lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
 
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Tue, 12 Jan 2016 09:30:07 -0800
From: Bill Cox <waywardgeek@...il.com>
To: "discussions@...sword-hashing.net" <discussions@...sword-hashing.net>
Subject: Re: [PHC] Re: Attack on Argon2i?

I confirmed what the paper said with a small test program you can get from
github <https://github.com/waywardgeek/argon2memtest>.  Here's the output
when run using 2^26 1KiB blocks:

./argon2memtest $((1 << 26))
Max blocks used 12409040 out of 67108864.  Memory reduction 5.41X

So, the memory reduction without recomputations is actually closer to
5.41X, in single-pass mode.  While higher than I was expecting, the
recommended minimum t_cost for Argon2i is 3, and should remain 3.  I
personally would generally use Argon2i with t_cost of 3, while Argon2id
with t_cost of 1.

Bill

Content of type "text/html" skipped

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux - Powered by OpenVZ