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  • Subject: Re: How to preserve password change date
  • From: John Earl <johnearl@xxxxxxxxxx>
  • Date: Tue, 18 Nov 1997 06:10:00 -0800

At 06:36 PM 11/17/97 -0500, you wrote:
>Booth,
>
>There is a suite of password APIs that allow you to retrieve the ENCRYPTED
>value of a users password and then use that value to set the user's password
>at a later date/time. Thus it is now possible to "retrieve" a user's
>password. Notice that the original post did not want to see the unencrypted
>value, which you cannot do.....maybe.....
>
>My biggest question is this: Does the word "PASSWORD" always resolve to the
>same encrypted value? 
Yes.

If so, couldn't I retrieve the encrypted password, do
>a reverse lookup into a table of plain to encrypted values and retrieve the
>clear text password for the encrypted value? It may take me a few weeks of
>machine time to build this table of clear to encrypted values, but it could
>be worth it.

Yes again. A 'dictionary hack' is now a much more feasable endeavor.  All
the more reason for enforcing non-trivial passwords.


jte


jte

>
>-Walden
>-----Original Message-----
>From: boothm@ibm.net <boothm@ibm.net>
>To: MIDRANGE-L@midrange.com <MIDRANGE-L@midrange.com>
>Date: Monday, November 17, 1997 8:37 AM
>Subject: RE: How to preserve password change date
>
>
>>
>>>Don't even think about trying to change audit values like last password
>>>change date.
>>
>>Is there another way to reach your goal without mucking in the user
>>passwords?  Somewhere recently I saw it written that passwords go into an
>>AS/400 encrypted, and there purposely isn't any unencryption method, so,
>>on the face of it, it seems to me your original goal is not possible, at
>>least not for ordinary men.
>>
>>----------------------------------------------------
>>Booth Martin
>>---------------------------------------------------
>>
>>
>>
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>
*********************************
* John Earl                     *
* Lighthouse Software Inc.      *
* 8514 71st NW                  *
* Gig Harbor, WA 98335          *
* 253-858-7388                  *
* johnearl@lns400.com           *
*********************************



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