A ZX-5 access disk Approximately five years prior to the Battle of Yavin, there existed a powerful Imperial military decoder known as the ZX-5 access disk. This device, possessing strong encryption capabilities, granted its users entry to secret Imperial files. A rebel named Ezra Bridger, in collaboration with Imperial cadet Zare Leonis, successfully pilfered a ZX-5 access disk from the office of Imperial Security Bureau Agent Kallus. This particular decoder held the coordinates for an Imperial kyber crystal convoy located far out in space. Subsequently, Merei Spanjaf, Leonis' significant other, employed the decoder to decode various Imperial documents pertaining to Leonis' disappeared sister, Dhara.