Tang binding daemon.
Tang is a server for binding data to network presence.
This sounds fancy, but the concept is simple. You have some data, but you only want it to be available when the system containing the data is on a certain, usually secure, network. This is where Tang comes in.
Automated Encryption Framework
Clevis is a pluggable framework for automated decryption. It can be used to provide automated decryption of data or even automated unlocking of LUKS volumes.