This safe i made from the "IPROBERRY" version. The cage on the top is to hold the "keys". To build the original safe go to https://www.instructables.com/id/Lego-Safe-1 . There are 2 locking mechanisms in this version too. There are also different types of holes that fit the keys but do nothing to confuse others. The right side is the 2nd mechanism and the back is the "safe" part
Step 1: The Keys
The keys enter holes like the original. They can be removed and put into the cage. They are the same.