Date: Tue, 16 Jun 2009 11:50:32 -0500 From: Minga Minga <mingakore@...il.com> To: john-users@...ts.openwall.com Subject: Re: MPI John (was: Re: GI John) > > It's important to note that current MPI implementations of JtR are > only effective in incremental mode. > This is a really important point. Incremental mode works quite well, but in some/most cases, its not the fastest way to crack a large amount of passwords. Using Rules, Wordlists, and Markov mode can be much more effective. I have mistakenly tried to run the MPI implementation with wordlist mode, etc many times - I now see why that's dumb ;) I pretty much do not even bother with the current MPI implementation because the use of incremental mode can be combined with --external:Parallel extremely easily and can be TRUSTED to not duplicate effort. If you generate your own .CHR file for a large password set (like a partially cracked 'pwdump' output file') incremental mode can be quite powerful/usefulmyu though. The main questions I have are : Is MPI+incremental mode faster than --external:Parallel ? If so, by what percentage? Benefits ? Drawbacks? Can I trust MPI to not duplicate effort? Am I wasting CPU cycles using --external:Parallel for large "incremental" runs? -Minga
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