Add the option to craft the personal safe in a crafting grid to produce the keypad safe. The first time you rightclick, a keypad GUI appears. You then input the code you want the thing to be set to, then click some enter or OK button or something. Then that keycode will be bound to that chest. Rightclicking on it then will popup the same keypad gui, except now if you get the code right, it opens the chest inventory. If you get it wrong, it emits a redstone pulse the same length as a button. Would be very useful for people who are working together with someone else.
