The following API group provides a possibility to manage PGP keys. There are two types of keys: private and public. A public part of the key can be accessed by anyone, whereas a private part can only be accessed by the owner of the key. The user can set only the public part of the key to other users, while he can set a private part of the key himself. As all keys are encrypted, their encrypted content cannot be accessed by a service provider but rather clients.