Brute-Force mask

[royce]

There are probably too many combinations to reasonably exhaust, but to model how many masks would be needed, you can use the `policygen` tool from the PACK toolkit:

https://github.com/iphelix/pack/blob/mas...licygen.py

Note that because of how policygen works, it will take a while to run.

Code:

$ policygen --minlength 13 --maxlength 13 --mindigit 5 --maxdigit 5 --minupper 8 --maxupper 8 -o 8upper5digit.masks

$ wc -l 8upper5digit.masks
1287 8upper5digit.masks

Each of these masks will take two weeks to run on a single GTX 1080:

https://www.wolframalpha.com/input/?i=%2...4%29%2F365

... so that's about 49 years.