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Date: Fri, 31 Jul 2015 16:14:14 +0200
From: Frank Dittrich <>
Subject: Re: Johnny: core/jumbo differences

On 07/31/2015 03:55 PM, Mathieu Laprise wrote:
> On Fri, Jul 31, 2015 at 9:28 AM, Shinnok <
> <>> wrote:
>     > --loopback[=FILE]         like --wordlist, but fetch words from a .pot file
>     > --prince[=FILE]           PRINCE mode, read words from FILE
>     > --mask=MASK               mask mode using MASK
>     > --markov[=OPTIONS]        "Markov" mode (see doc/MARKOV)
>     Are these the four attack methods specific to Jumbo? If yes, then
>     I'd like these to be supported next by Johnny as part of the jumbo
>     coverage objective, unless there are some other more important
>     option candidates suggested here.
>     Mathieu, you can start playing with these a bit at the command line.
>     Try at least two attacks for each mode so you get a sense of what
>     they do.
> Shinnok, thanks for reviving that thread, I've never seen it back in
> april, it was lost in my mailbox. It has interesting informations. I'll
> start playing with these 4 modes to understand them.

prince mode is not mentioned in the docs at all, see
The issue also mentions a PDF document describing the attack:

Loopback mode is only mentioned in doc/OPTIONS.

Markov mode and mask mode mode are mentioned in doc/MODES. They also
have separate doc/MARKOV and doc/MASK files.
May be all the modes should be mentioned in doc/OPTIONS as well.

Let us know if you think the docs need to be improved.


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