Rank cylinder

Rank cylinders were multi-purpose security access devices used to denote rank and security clearance. They also doubled as access keys that allowed Imperial officers access to sensitive areas depending on their clearance. At each checkpoint, the cylinder was inserted into a scomp link access that checked the security clearance of the cylinder's user by interfacing the cylinder with the central facility computer. Generally, the higher the rank of the officer, the more rank cylinders they wore.

Appearances

 * A New Hope
 * Empire Strikes Back
 * Return of the Jedi
 * X-wing: The Bacta War