• Subject: Re: Fw: Rewarding challenge AS/400...
  • From: "Phil Hall" <hallp@xxxxxxxx>
  • Date: Thu, 16 Sep 1999 12:03:58 -0500

Just to put some peoples minds at rest, according to IBM, the password
encryption on the AS/400 is one way only. There is **NO** API or program
supplied that will decrypt the passwords on the AS/400. All password
comparison (i.e. when you sign on, or use the profile APIs) is made between
encrypted versions of the passwords. They also state that no un-encrypted
versions of the password is stored on the machine.

This doesn't stop a brute force attack.

Now to put the cat among the pigeons, if this is true, then surely the
method of encryption cannot be that strong, as otherwise the code to allow
the implementation of the password limiting system values would be
impossible...?

--phil



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