Like HTTP Basic Authentication, HTTP Digest Authentication authenticates a user based on a username and a password. However, unlike HTTP Basic Authentication, HTTP Digest Authentication does not send user passwords over the network. In HTTP Digest authentication, the client sends a one-way cryptographic hash of the password (and additional data). Although passwords are not sent on the wire, HTTP Digest authentication requires that clear text password equivalents be available to the authenticating container so that it can validate received authenticators by calculating the expected digest.
The following example shows how to declare HTTP Digest authentication in your deployment descriptor:
<login-config> <auth-method>DIGEST</auth-method> </login-config>