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Zactly!

jte
Sent via BlackBerry from T-Mobile

-----Original Message-----
From: "Walden H. Leverich" <WaldenL@xxxxxxxxxxxxxxx>

Date: Wed, 17 Jun 2009 17:12:14
To: Midrange Systems Technical Discussion<midrange-l@xxxxxxxxxxxx>
Subject: RE: AS400 Automatic Sending of New Password?


If you can encrypt a password on SYSA and store it and use it on SYSB
(and you can) then the last 32 passwords would not be a requirement.

And that's the basis of the dictionary attack. IIRC, the same password
will always encrypt (likely a hash) to the same value. It has to if I
can move the encrypted values between machines. Therefore I build a nice
table of plaintext to encrypted/hashed passwords and read it backwards.

-Walden

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