Each player can lock 5 chests and 5 doors - More available to Donors.
Players can Craft and Place Tier 1-5 Chests and Doors. Tier 6 are only available to staff.
Higher tier chests are more difficult to pick.
Once the chest or door is placed you will be given a key.
You can craft a keyring to store all your keys.
Only Smiths can create Lock Picks. You can use a lock pick to create extra keys for your own locks. Picking other people's locks is something which will become available in time.
Only an Engineer can create traps, but anyone can place a trap on a lock they have the key to. The trap will be sprung if someone tries unsuccessfully to pick your lock.