How to use encrypted pak files?

hi .
i followed your suggestion about 4.12 release not. and figure out about

Build\NoRedis\Keys.txt

but the problem is that i tried with several private/public password exponent and modulas. but all of them failed to pass the password Testing phase and was rejected by unrealpak.exe.
so can u plz provide 3 acceptable sample key to put in Keys.txt .

i tried to generate them using unrealpak.exe. but after 2 hour still it is keep running.
i have opened a thread also about this generate part:

but so far nothing.