This is the Hindi translation of our recently published book, Dissent on Aadhaar: Big Data Meets Big Brother.Focussing on Aadhaar, but drawing lessons from ID projects from other parts of the world also, this book alerts readers to the dangers lurking in such expansive digital ID projects. For example, how profiling, made possible by Aadhaar, impinges on the fundamental Right to Privacy; or how surveillance leads to self-censorship and can choke free thought and expression; or how Aadhaar, contrary to government claims, excludes people entitled by right from welfare when made compulsory. On the technology side, what are the perils of using biometrics and the dangers arising from centralised databases? Who has access to all our data, and how can it be used against us? Aadhaar, Indias unique identity system, was introduced in 2009 with the stated purpose of creating a more inclusive and efficient welfare system. Hundreds of millions of Indians were enrolled into the biometric database, with successive governments creating pressure by making it compulsory for social benefits. Even after the Supreme Court verdict in 2018, it remains a must-have for welfare. Aadhaar per Aitraaz argues that Aadhaar was never really about welfare. The essays in this book explain how the project opens the doors to immense opportunities for government surveillance and commercial data-mining. With contributions from economists, lawyers, technologists, journalists and civil liberties campaigners, this book is for everyone concerned about a healthy democracy in India and beyond. It will be also be of interest to students and scholars of political science, law and public policy.