To echo what Forever said, Hacked Decryptor Keys are only obtained from End of Match (EoM) salvage from Public Contract matches or buying them in the Marketplace with Aurum.

However, they can also be obtained by doing various daily missions as well. The daily missions are random and you may be lucky enough to find a mission you can do that rewards you with a Key.

I wouldn't mind the encrypted boxes so much if the keys were awarded more often. I've accumulated over 700 in the shot time since their introduction but haven't received even 1 key as an end of match reward! I'm rewarded with plenty of useless encrypted boxes, just no way to open them.

What bothers me even more is that I liked getting useful gear/weapons as end of match rewards. Sadly its obvious that boxes are awarded instead. Yes, occasionally I might get something useful in addition to more of those damn boxes, but not often. Unless keys are awarded more frequently, the boxes aren't really a reward .. they are a request for payment!

The problems with Strongboxes have been noted. Namely that you get so many that you would never spend the amount of real money it would take to open them all, so you give up and donGÇÖt bother buying any keys.

There have been many solutions thrown about. My favourite, and one I think is likely to be implemented, is adding the ability to force the Strongbox open, with a high percentage chance of destroying what was in the box. This would give OCD people a way of getting rid of their Strongboxes without paying real money, and give you a chance to get some of the loot without spending money on Keys. But to encourage people to actually spend AUR on Keys, they would also prominently display the stuff that was destroyed when you force a Strongbox open, so you know what you missed out on.