Article View: sci.crypt
Article #445Re: Crypt should be based on MD5 (was: the Crypt 16 discussion)
From: Leonard Erickson
Date: Tue, 21 Jul 1992 14:06
Date: Tue, 21 Jul 1992 14:06
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ts@cup.portal.com (Tim W Smith) writes: >> But even with this, we got squawks about "why do we need to change >> passwords every 90 days?" (we couldn't push a shorter interval on them). >> And we had people who insisted on being able to re-use passwords. >> >> Unless you can get the users to *care* about security, they aren't >> going to bother. >Has anyone shown that forcing users to change passwords every so often >actually makes things more secure? Isn't frequent changing of passwords >just going to make it more likely that users will write down the passwords >somewhere? Well, there *are* reasons why you pretty much *have* to do periodic changes or accept ever increasing loss of security. We *knew* that people would give out their passwords to other users. Even though this was very much *against* policy. by changing the passwords we at least chopped off those "holes" every so often. Note that we were *trying* to get users to use the "grant" command, which could be used to give another account specific access rights in a users files ort directories. It was prefffered because ypu can easily *list* who you've given what rights to (the TLIST command). We may have had some problems *due to* the changes. But we know that they closed the holes at least temporarily. The users weren't doing a "I'll share my password with Joe", instead it'd be something like Joe saying "Hey, where's that report, I need it!" and the user giving Joe their password instead of loggining in and granting access or copying it to a directory joe had access to. -- Leonard Erickson leonard@qiclab.scn.rain.com CIS: [70465,203] 70465.203@compuserve.com FIDO: 1:105/56 Leonard.Erickson@f56.n105.z1.fidonet.org (The CIS address is checked daily. The others infrequently)
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Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!wupost!uwm.edu!ogicse!qiclab!leonard From: leonard@qiclab.scn.rain.com (Leonard Erickson) Newsgroups: sci.crypt,comp.security.misc Subject: Re: Crypt should be based on MD5 (was: the Crypt 16 discussion) Message-ID: <1992Jul21.140600.23632@qiclab.scn.rain.com> Date: 21 Jul 92 14:06:00 GMT Article-I.D.: qiclab.1992Jul21.140600.23632 References: <2a510a22@babyoil.ftp.com> <709960260@romeo.cs.duke.edu> <PMETZGER.92Jul8120712@snark.shearson.com> <21106@rpp386.lonestar.org> <1992Jul9.035150.3220@qiclab.scn.rain.com> <62451@cup.portal.com> Reply-To: 70465.203@compuserve.com Organization: SCN Research/Qic Laboratories of Tigard, Oregon. Lines: 37