Explain the different authentications in Java Servlets.
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Authentication options are available in Servlets: There are four different options for authentication in servlet:
Basic Authentication:
Usernames and passwords are given by the client to authenticate the user.
Form-based authentication:
In this, the login form is made by the programmer by using HTML.
Digest Authentication:
It is similar to basic authentication, but the passwords are encrypted using the Hash formula. Hash Formula makes digest more secure.
Client certificate Authentication:
It requires that each client accessing the resource has a certificate that it sends to authenticate itself. Client Authentication requires the SSL protocol.