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Article View: comp.security.misc
Article #203

Re: Problem with npasswd??

#203
From: Doug Siebert
Date: Tue, 28 Jul 1992 01:22
33 lines
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In article <1992Jul27.184324.14697@hubcap.clemson.edu> hubcap@hubcap.clemson.edu (System Janitor) writes:
>Unless I am mistaken, npasswd doesn't check for everything crack does.
>Even dropping the time consuming crypt part, it seems like it would
>take an unacceptable amount of time to change your password if it were 
>checked against, say, an 800,000 word dictionary with 300 transmogrification 
>rulesets.

Why should that be time consuming?  Space consuming, yes?  But not time
consuming.  Ever hear of a binary search? ;-)

>
>The point is, even if you use npasswd, a cracker will still get some of
>your passwords. So what if they only get 10 instead of 200, they'll still
>have some userids from which to launch their nefarious plans.
>So, aren't you fooling yourself to think that npasswd like schemes 
>enhance your system security enough to make them worthwhile? 

With that kind of logic why bother with security at all?  If you figure that
unless you have extreme measures any given site on the Internet will be hit by
crackers eventually you could just chuck all the security checking altogether,
couldn't you?  If you really do check a 800,000 word dictionary with 300
transmorgrifications each a cracker would have to work a REALLY long time to
get even one password, making it more likely for someone to notice him.  Its
certainly an improvement over the alternative, isn't it?

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Message-ID: <1992Jul28.012207.27248@news.uiowa.edu>
Path: arc1-ca.pugleaf.net!sparky!uunet!news.uiowa.edu!icaen.uiowa.edu!dsiebert
References: <PCL.92Jul27140810@black.oxford.ac.uk> <1992Jul27.184324.14697@hubcap.clemson.edu>

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Newsgroups: comp.security.misc,alt.security,comp.unix.ultrix
Path: arc1-ca.pugleaf.net!sparky!uunet!news.uiowa.edu!icaen.uiowa.edu!dsiebert
From: dsiebert@icaen.uiowa.edu (Doug Siebert)
Subject: Re: Problem with npasswd??
Sender: news@news.uiowa.edu (News)
Message-ID: <1992Jul28.012207.27248@news.uiowa.edu>
Date: Tue, 28 Jul 1992 01:22:07 GMT
References: <PCL.92Jul27140810@black.oxford.ac.uk> <1992Jul27.184324.14697@hubcap.clemson.edu>
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