Firewall Wizards mailing list archives
Re: strong passwords
From: Mikael Olsson <mikael.olsson () clavister com>
Date: Wed, 10 Jul 2002 18:32:51 +0200
And taking the next logical step: Mikael Olsson wrote:
For 100 balls going into 100 buckets: - 37 non-collisions - 37 single collisions (hey, 50:50 :)) - 18 double collisions
[and there's triples and quadruples too, btw] So, for our 100 inputs, we get 37*1 + 37/2 + 18/3 = about two thirds of all outputs used And this is why I heartily disagree to hash loops, e.g. take an input, and hash it an obscene number (let's say 1000) of times. Every loop, statistically speaking, we're destroying input entropy. But, then again, I'm not a cryptographer. I'm sure there's one around to disagree with me. :) -- Mikael Olsson, Clavister AB Storgatan 12, Box 393, SE-891 28 ÖRNSKÖLDSVIK, Sweden Phone: +46 (0)660 29 92 00 Mobile: +46 (0)70 26 222 05 Fax: +46 (0)660 122 50 WWW: http://www.clavister.com "It's July. I'm on vacation. Can't you tell? :)" _______________________________________________ firewall-wizards mailing list firewall-wizards () honor icsalabs com http://honor.icsalabs.com/mailman/listinfo/firewall-wizards
Current thread:
- Re: strong passwords miha (Jul 09)
- Re: strong passwords Mikael Olsson (Jul 10)
- Re: strong passwords Mikael Olsson (Jul 10)
- Re: strong passwords Mikael Olsson (Jul 10)