On 02/15/2015 10:09 PM, Tim wrote: <<>> > It's a hell of a long time since I did probabilities in high school > maths, but if you just use letters instead of numbers, each position > could be any of 26 characters (instead of 10 options), and each > position is not related to any other character (one does not > determine the other), so my example means that it represents an > unknown number of 26 to the power of 17 that you have to guess at. or maybe they did not teach you correctly. ;-) and, it is really not a probability calculation. if one uses only the 27 characters, with password 27 characters long, the number of possible combination is found by multiplying; 1x2x3x4x5x6x7x8x9x10x11x12x13x14x15x16x17x18x19x20x21x22x23x24x25x26x27= 4.9494861138265237094e+26 [do not ask how i am aware of factor as it relates to national security] which would take an extensively long time for a grid of Cray-2 or Blue Gene computer systems to break. and to do such, 1 Cray-2 would need to first run process to find all the possibilities, which would then be divided to sequential groups of sections of sequence. with 3 strikes, wait an hour, it could take a long time, which can be calculated by factoring number of sequences assigned to each cray in above grid, especially if correct sequence was last in group. ((GBWG)) > If you really think that you could have guessed /that/ password in a > useful time, please let us know the winning lottery numbers for next > week, while you're at it. NFW. do you really think i would tell you number if i new it. :-P -- peace out. in a world with out fences, who needs gates. CentOS GNU/Linux 6.6 tc,hago. g . -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
