Code cylinder

Code cylinders, also referred to as coded rank cylinders, security rank cylinders, coded key cylinders, and data cylinders, were security devices in the shape of short cylinders that were used by the Galactic Empire and, decades later, by the First Order. They contained coded information about their bearers and granted them access to secure areas by usage of scomp links. It was not uncommon for high-ranking personnel to own multiple code cylinders, each with their own encrypted access codes.

Text and facts from the “Code cylinder” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.