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- Xref: sparky comp.security.misc:851 alt.security:4030 comp.unix.ultrix:5933
- Newsgroups: comp.security.misc,alt.security,comp.unix.ultrix
- Path: sparky!uunet!gatech!hubcap!hubcap
- From: hubcap@hubcap.clemson.edu (System Janitor)
- Subject: Re: Problem with npasswd??
- Message-ID: <1992Jul28.160606.12234@hubcap.clemson.edu>
- Organization: Clemson University
- References: <PCL.92Jul27140810@black.oxford.ac.uk> <1992Jul27.184324.14697@hubcap.clemson.edu> <1992Jul28.012207.27248@news.uiowa.edu>
- Date: Tue, 28 Jul 1992 16:06:06 GMT
- Lines: 36
-
- dsiebert@icaen.uiowa.edu (Doug Siebert) writes:
-
- >With that kind of logic why bother with security at all?
-
- Now now. Calm down. I don't think my logic makes me that much of a kook.
- I want an unCrackable password file. I haven't yet come up with how to
- get one. npasswd, which has been defended nicely here since I first posted,
- doesn't seem like the way to get an unCrackable password file. Nobody
- wants draconian security measures that get in the user's ways, so what
- we need is a simple elegant way to get an unCrackable password file.
- There may not be a simple elegant way to get an unCrackable password file.
- That doesn't stop us from looking for one.
-
- >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
-
- It takes a long time to run to completion, but it doesn't take long at all
- to get lots of passwords. After the first rush of easy-to-guess passwords
- spews out (these are the ones I would expect npasswd to cut down on) then
- harder ones continue to dribble out for days. I wouldn't expect npasswd
- to make that much of an impact on these. npasswd is a good thing in its
- own light, but I always thought it sprang up as a (flawed) way to fight crack.
-
- I'll try to scrounge up the time (to convince a graduate student :-) to
- graft crack to npasswd (seems like someone would have already done that)
- and then hook it to our 800,000 word dictionary and 300 rulesets and see
- how long it takes. Already this discussion has suggested some optimizations
- on how to zip through the rulesets.
-
- -Mike
-
- Humorous aside: A local user set his password to a ``random'' string
- of lower case letters. While Crack was going through the rock-star
- dictionary, and was checking for the drummer of Metalica backwards, it
- got him!
-