Hybrid Key Distribution is an #Asymmetric Cryptography used for #master key distribution by relying on Key Distribution Center (KDC)#. It has a better performance and is backward compatible.
There will be three keys used in this scheme: public key, master key and session key. Each user will share the same secret master key, which is distributed by public key (that is encrypted using public key when distributing). Session key, which is the secret key itself, will be distributed using the master key.