Article View: sci.crypt
Article #2320Re: Exporting password protection
From: Carl Ellison
Date: Thu, 17 Dec 1992 21:58
Date: Thu, 17 Dec 1992 21:58
29 lines
1834 bytes
1834 bytes
In article <BzEwLo.DB6@jabba.ess.harris.com> mvm@epg.harris.com (Matt Mahoney) writes: >You should be able to implement password protection using a one-way >hash function instead of encryption. [...] I would recommend the >MD4 or MD5 hash functions, which (as far as I know) are public >domain, freely exportable, and haven't been broken in spite of wide use. I'd consider using both MD2 and MD5 -- maybe as a cascade. There's no reason to make this fast (so MD4 isn't called for) -- and it's better to make it slow. The slower the code, the harder to do brute force attacks. Note that passwords can still be guessed if they're otherwise guessable: eg., a person's name. I recommend password sentences. My preference is for sentences (possibly computer-generated) which are nonsense. There are more nonsense sentences than real ones and they can be strange enough to be easy to remember. Eg., my friend Tom VanVleck coined the following MANY years ago: "Light bulbs are full of water." It shouldn't be hard to generate your own patently false sentences. -- -- <<Disclaimer: All opinions expressed are my own, of course.>> -- Carl Ellison cme@sw.stratus.com -- Stratus Computer Inc. M3-2-BKW TEL: (508)460-2783 -- 55 Fairbanks Boulevard ; Marlborough MA 01752-1298 FAX: (508)624-7488
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Path: arc1-ca.pugleaf.net!sparky!uunet!noc.near.net!transfer.stratus.com!ellisun.sw.stratus.com!cme From: cme@ellisun.sw.stratus.com (Carl Ellison) Newsgroups: sci.crypt Subject: Re: Exporting password protection Date: 17 Dec 1992 21:58:10 GMT Organization: Stratus Computer, Software Engineering Lines: 29 Distribution: usa Message-ID: <1gqt5iINNe4v@transfer.stratus.com> References: <1992Dec17.001509.16599@rosevax.rosemount.com> <BzEwLo.DB6@jabba.ess.harris.com> NNTP-Posting-Host: ellisun.sw.stratus.com