Re: Is it possible to crack the BPCS Key logic?

["pook48" <pook48@xxxxxxxx>]

on the as/400 version 2-6 (the only difference in routines is century 
dating on temp keys).

bpcs key if perm uses the key against system serial no. in an 
algorythm.

if temp key then expiry date is factored in as well.

key verification is done in date conversion routines (sys90x) and a 
and a pass or fail status is returned in date routines

if fail then control passed "security violation" screen then logoff,
if pass then returned inline to calling program.

my comment on breaking routines is why bother, if someone wanted to 
circumvent then simply re-write date sys90x and not check key.


cheers

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