Date: Sat, 17 Jun 2006 00:54:11 +0300 From: Pietari Kivikangas <JTR1998@...l.ru> To: john-users@...ts.openwall.com Subject: Re: Re: Inverted chatsets? Pietari Kivikangas wrote: > When the rec_entry variable in the module inc.c (in .rec file produced > by John The Ripper version 1.7 it is stored at the 11th position from > the end of file, the following numbers are 0 and 8) reaches the range > of values 3000-3419, the probability of the next password candidate > being the password you are looking for floats in the range between > 1/0x00003afa8baa2780LL and 1/0x00000057cfdce769LL. Sorry, i calculated wrong. Below the calculations seem to be correct (i'm not a specialist in statistics though): Total amount of all possible password candidates: 6634204312890625 Approximated total number of password candidates within the 'rec_entry' value 3000: 0x00000057cfdce769 = 377149515625, i.e. about 0.00568% of all passwords. Approximated total number of password candidates within the 'rec_entry' value 3419: 0x00003afa8baa2780 = 64847759419264, i.e. about 0.97748% of all passwords. So in both cases the probability for a single candidate is equal, i.e. 0.00568% / 377149515625 = 0.97748% / 64847759419264 = 1,5073397695288715005983296011248e-16 (without %). But for the 'rec_entry' value 3419 there are much more password candidates than for 3000.
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