Path: utzoo!mnetor!uunet!husc6!cmcl2!brl-adm!umd5!purdue!i.cc.purdue.edu!j.cc.purdue.edu!pur-ee!iuvax!inuxc!ihnp4!ttrdc!levy
From: levy@ttrdc.UUCP (Daniel R. Levy)
Newsgroups: comp.unix.wizards
Subject: Re: Remembering old passwords (was 60-second timeout in Unix login)
Message-ID: <2178@ttrdc.UUCP>
Date: 17 Feb 88 03:55:43 GMT
References: <10578@brl-adm.ARPA> <721X@jimi.cs.unlv.edu> <465@xios.XIOS.UUCP> <18083@topaz.rutgers.edu>
Organization: AT&T, Skokie, IL
Lines: 14

In article <18083@topaz.rutgers.edu>, ron@topaz.rutgers.edu (Ron Natalie) writes:
> Actually at BRL, it remembers all past passwords that everyone used and
> won't ever let you reuse them (or use the "passwd" program to set too
> accounts to the same password).

How is this implemented without saving passwords somewhere in the clear?
Also -- if "passwd" unexpectedly refuses to let a user set a proposed password
he has chosen, it would be a tipoff that he has stumbled over somebody else's
current password.
-- 
|------------Dan Levy------------|  Path: ..!{akgua,homxb,ihnp4,ltuxa,mvuxa,
|         an Engihacker @        |  	<most AT&T machines>}!ttrdc!ttrda!levy
| AT&T Computer Systems Division |  Disclaimer?  Huh?  What disclaimer???
|--------Skokie, Illinois--------|