Aadhaar is an ambitious project by the Indian government to put every resident on an online database. It is the biggest of its kind project in the world. It is not only done in a country that is one of the most populous but also built on the state-of-the art technology. One of the service expected to offered by Aadhaar project is online authentication and verification of the residents. Towards this end, the Aadhaar authentication service expected to be open by year-end. The additional details are here