International Journal of Computer Applications
A single sign - on is a new authentication mechanism for user to use multiple services provided by service provider in distributed computer network. It is a one type of application in that allows users to log in once and access to multiple independent applications without being asked to log in again at every application. It enables a legal user with a single credential to be authenticated by multiple service providers in distributed computer networks. This scheme has security flaws. Service provider is failed to credential privacy and authentication.