[gjmacd]

and why was there a "master" key?

[GoblinSlayer]

Looks like it's a key related to South african social security agency and cards are replaced because the dudes rampaged the entire bank system.

[theandrewbailey]

They probably rolled their own encryption, because it was over 20 years ago.

[selimthegrim]

https://classicprogrammerpaintings.com/post/148027314949/we-...