Protecting Your Items

The Exhalodius server uses a physical lock plugin called LoreLocks. This allows players to craft locks, keys, lockpicks, and defences for their locks.

LoreLocks
The bukkit page for the plugin will show you all crafting recipes and has a few helpful tutorial videos as well.

http://dev.bukkit.org/bukkit-plugins/lorelocks/

Locking Chests/Doors
To lock up a chest first craft the lock of your choice then place the lock in the top left corner slot.

To lock a door just right-click the door with your lock in your hand.

Keys
To make a key for the lock you have created, just left-click on the lock with a single lockpick. It will be changed to the key for that lock and will give you access to your chest or door. If you loose it you will need to lockplick your way into your own chest and make a new key.

Lock Picking
http://dev.bukkit.org/bukkit-plugins/lorelocks/pages/lockpicking/