Certificate   For server authentication certificates, the self-signed certificate is distributed to clients. It is an electronic document including identity information, the public key of the server, and a self-signed digital signature.

Identity file   For server authentication certificates, the identity file is stored securely with a MobiLink or database server. It is a combination of the self-signed certificate (that is distributed to clients) and the corresponding private key. The private key gives the MobiLink or database server the ability to decrypt messages sent by the client in the initial handshake.