I like the concept but your requirement to NOT store the Password Of the Day and generate it every time it's needed means you can't pick other external inputs to feed the process. For example you could call a web service to check the temperature in some known location as one bit of the seed, then check the water level in some river, toss in the cycle of the moon, and the date, mix in the percent full of the disks, and add a pinch of the faulting rate for the *BASE pool. Oh but all of those things change constantly except the date, rats. Maybe you could architect it so the P.O.D. is kept in a running program only and requested from that program. Each time the program starts or when some magic time each day occurs it generates the P.O.D and holds it. Just a thought.....

- DrFranken

On 6/11/2010 6:05 PM, Simon Coulter wrote:

Looking for suggestions:

I want to protect access to an application via a password. I want the
password to automatically change daily. I want the application to be
able to determine today's password without having to read it from an
external source (i.e., algorithmically/programmatically derived). This
last requirement means:

o no special profile with password changed daily
o no validation list use
o no encrypted password stored in external object such as *FILE or

I envisage:
o Application objects are *PUBLIC *EXCLUDE
o Application objects are authorised to a specific group profile
o Password generator is *PUBLIC *EXCLUDE
o Password generator is authorised to a specific profile (different
from the above)

In actual use a user who is a member of the application group AND who
needs to use this particular application will request the password
from an authorised issuer. The issuer will use the password generator
to determine today's password. The user will then use the application.

The "automatic daily change" requirement means the password generation/
validation is tied to the date but obviously simple encryption linked
to the date will not be very secure nor will each daily password be
sufficiently different from the previous one.

I have some ideas but thought I would see what others suggest--always
presuming you think this sufficiently interesting to bother with :)

Simon Coulter.
FlyByNight Software OS/400, i5/OS Technical Specialists

Phone: +61 2 6657 8251 Mobile: +61 0411 091 400 /"\
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