Date: Tue, 18 Oct 2011 02:13:22 +0400 From: Solar Designer <solar@...nwall.com> To: john-users@...ts.openwall.com Subject: Re: filter performances On Mon, Oct 17, 2011 at 05:01:31AM +0400, Solar Designer wrote: [...] > appears to be 3025989069143040 combinations, which is roughly 45% of > the original total. I computed it with the attached comb.c program, > which I had tested with smaller settings (comparing its output vs. > actual results). Now that I know this number, I was able to find two more instances of it on the web, computed using different approaches: http://mathforum.org/library/drmath/view/52277.html http://www.passwordresearch.com/files/Password%20Pool%20Possibilities%20-%20PUBLIC.xls Most other numbers from the tables I put at: http://openwall.info/wiki/john/policy are not found with Google's web search - in particular, it appears that no research had been done on keyspace reduction with "at least 2 characters of a class" requirements. This is a bit surprising. Alexander
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