Digest authentication is a simple HTTP authentication mechanism in which the password are never exchanged over the network in clear-text and cannot be decrypted from the secure communication’s data stream. Each web application using digest metod has a distinctive Realm property (sometimes also called Domain), which can be thought of as a name for the application, which the Client can commonly identify. Besides identifying the application to the Client, it also serves as a protection against password fraud: the Realm is included in the hashes, which Client and Server exchange.