Date: Thu, 9 Mar 2006 12:22:14 +0100 (CET) From: rembrandt@...erlin.de To: john-users@...ts.openwall.com Subject: Re: checking only first 5 characters of a md5 hash > How can I tell John to get the substring of the hash and checking only its > 5 > chars? > > .Thanks. As far as I know you can`t because for this john would have to know the keyspace to know where to start and where to end. Maybe I`m wrong but such a function is not implemented (as far as I know) but reducing the keyspace by using parts of the key you know or even the start of the plaintext-password is maybe a neat function... :-) E.g. if you just saw that xyz entered "At526" at the beginning of the passwords. Not that we spy passwords.. it`s more to speed up cracking passwords of users who left. :-)) Kind regards, Rembrandt
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