Openwall GNU/*/Linux - a small security-enhanced Linux distro for servers
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Date: Tue, 03 Jul 2007 15:08:18 +0200
From: "Frank Dittrich" <>
Subject: Re: Incremental mode limited to 8 character words?

websiteaccess wrote:
>On Mon, 2 Jul 2007 16:22:31 +0100, Tom Earp wrote:
> > I have attempted this with no success...there is a comment in the
> > params.h file:
> > "be careful if you change these, ((SIZE ** LENGTH) * SCALE) should
> > fit into 64 bits. you can reduce SCALE if required"
> >
> > what does that actually mean? i would like to be able to generate
> > words between 8 and 30 characters in length
> >
> > any help would be much appreciated

There are threads in the mailing list archive, e.g.
But it will get increasingly difficult to crack a password using
incremental mode and a length > 8.

>  JTR is great but have some limitations (for example lentgh limit).
>  TRy "PasswordsPro" it's another great password cracker with no length
>limitation and a nice and usefull GUI !

JtR has a very useful incremental mode which generates password
candidates in a sequence that more likely passwords will be
cracked first.

IMO, you can't compare PasswordPro's incremental mode with
this strategy:

That will take a long time to go until you reach the limit of
length 32, but I doubt that
is a useful sequence to try, even if it *might* have advantages
when compared to.
Did you really crack a password longer than 8 characters using
PasswordPro's incremental mode?

But if you insist, you can easily implement an external mode
for JtR which does this for you.


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