eID, short for electronic identity, is the electronic counterpart to national identification card (NIC), driving license, passport, and other membership cards. In the changing world, which is moving more towards the online based services in public and private sectors, a person can present an eID electronically to prove his or her identity or their right to access information or services online. So that it can be used in two authentication modes, online and offline. From an electronic identity perspective, one person is usually involved in multiple sectors (e.g. taxation, social security, education, telephony services, banking services) and also often fulfills different roles (e.g. a civil servant, a lawyer or a driver) depending of the context. The privacy of individuals is a matter of concern in eID systems and were dedicated to research in this area and to provide a privacy enhanced eID system which addresses most of these issues.