From Citizen Sleeper Wiki
The Encrypted Key is a type of data players encounter during gameplay of Citizen Sleeper.
Description[edit]
The Encrypted Key is a type of data item that players obtain from the Data Cloud. It is a stream of passcodes, able to unlock the station's ageing maglocks. It is primarily used to unlock the Sealed Dock, thus, players need to obtain this before attempting to unlock the dock.