Can the government collect your fingerprints, iris scans, and personal data without your right to privacy standing in its way? For decades, Indian courts weren't even certain privacy was a constitutional right — until nine judges of the Supreme Court sat down to settle the question once and for all.
That question came up for final decision in Justice K.S. Puttaswamy (Retd.) v. Union of India which was decided on 24 August 2017 by a nine-judge Bench of the Supreme Court (Writ Petition (Civil) No. 494 of 2012). Popularly known as the Right to Privacy verdict, the judgment didn't just decide the fate of one government scheme — it changed the meaning of personal liberty in India.
- The petitioner: Justice K.S. Puttaswamy, a retired judge of the Karnataka High Court, filed a writ petition in 2012 challenging the constitutional validity of the Aadhaar scheme.
- The concern: Aadhaar required citizens to submit biometric data — fingerprints and iris scans — to receive a unique identification number. Puttaswamy argued the scheme lacked adequate safeguards to protect this personal information.
- The government's stand: The Attorney General argued that the Constitution did not guarantee any fundamental right to privacy, relying on two earlier rulings — M.P. Sharma v. Satish Chandra (1954, an 8-judge Bench) and Kharak Singh v. State of U.P. (1962, a 6-judge Bench) — where larger benches had declined to recognise such a right.
- The escalation: Since these were bigger benches, a smaller bench couldn't overturn them. A three-judge Bench, by order dated 11 August 2015, referred the question to a Bench of appropriate strength. It first went to a five-judge Constitution Bench, which on 18 July 2017 referred it further to a nine-judge Bench — the one that delivered this judgment.
The nine judges were essentially asked to resolve three questions:
Is there a fundamental right to privacy under the Indian Constitution at all?
If such a right exists, is it a standalone right, or does it flow from existing guarantees like the right to life and personal liberty (Article 21)?
If it exists, what are its limits — can the State ever lawfully intrude on it?
Puttaswamy's counsel argued that the right to privacy is inextricably linked to the right to life and personal liberty under Article 21, and is therefore part of the freedoms guaranteed by Part III of the Constitution. They also argued that M.P. Sharma and Kharak Singh were outdated, since a later, larger 11-judge Bench had already rejected the older reasoning those two cases were built on (in R.C. Cooper v. Union of India, 1970).
The Union of India maintained that privacy was never intended to be a fundamental right. It argued that privacy was too broad and undefined a concept for courts to protect through constitutional interpretation — if it needed protecting, only Parliament could do that, through a proper law.
The Bench unanimously rejected the government's position. All nine judges (Chief Justice J.S. Khehar, and Justices J. Chelameswar, S.A. Bobde, R.K. Agarwal, Rohinton F. Nariman, A.M. Sapre, D.Y. Chandrachud, Sanjay Kishan Kaul, and S. Abdul Nazeer) agreed that privacy is a fundamental right. But they arrived there through six separate opinions: Justice Chandrachud wrote for himself and three other judges (Khehar CJI, Agarwal and Nazeer JJ.), while the remaining five judges each wrote their own concurring opinions.
A few of these opinions illustrate how differently the judges got to the same conclusion:
- Justice D.Y. Chandrachud held that privacy flows from Article 21 and Part III, tied to a person's control over their own personality — a natural right, inseparable from dignity.
- Justice J. Chelameswar held that the right to privacy has three facets — repose, sanctuary, and intimate decision — each essential enough to liberty that privacy has to be part of it too.
- Justice S.A. Bobde held that privacy is an inalienable natural right tied to dignity and autonomy, and deserves fundamental right status either way.
Together, the Bench held that any State action touching privacy must pass a three-fold test:
Legality — there must be a law permitting it.
Necessity — it must serve a legitimate state aim.
Proportionality — the method used shouldn't go further than necessary to achieve that aim.
The Supreme Court unanimously held that the right to privacy is a fundamental right, protected under Articles 14, 19 and 21 of the Constitution. In doing so, it overruled M.P. Sharma and the majority opinion in Kharak Singh to the extent they had held otherwise.
The Bench also used this occasion to overrule ADM Jabalpur v. Shivkant Shukla (1976) — the Emergency-era ruling that had allowed the right to life to be suspended — holding that life and personal liberty are inalienable and cannot be taken away even by the State's own emergency powers. It clarified that privacy, like other fundamental rights, can only be restricted through a fair, just and reasonable procedure backed by a legitimate state interest.
- It settled, once and for all, that privacy is not a "privilege for the few" but a right available to every citizen.
- It extended constitutional protection to the digital sphere — recognising that personal autonomy and data must be protected as much as physical liberty.
- It gave India a workable test (legality, necessity, proportionality) for judging any law that restricts personal liberty — a test still used by courts today.
- It laid the constitutional foundation for India's later data protection law and for further decisions on personal autonomy.
The Puttaswamy judgment continues to shape how Indian courts think about individual liberty in the digital age. Its reasoning influenced the decriminalisation of homosexuality, the decriminalisation of adultery, and ongoing debates around data protection, government surveillance, and police access to personal devices. For students of constitutional law, it's a rare example of the Supreme Court directly confronting and correcting its own past mistakes across nearly six decades of jurisprudence.
What makes Puttaswamy worth studying closely isn't just the outcome — it's watching nine judges take one question and arrive at the same answer through six different lines of reasoning. Tracing that reasoning, rather than just memorising the verdict, is what actually makes you think like a lawyer. It's the kind of case-driven learning worth looking for when you're comparing affiliated law colleges.
As data protection, digital rights and technology law become a bigger part of legal practice in India, cases like this one aren't just constitutional law history — they're the foundation students will keep returning to throughout their careers.
At CFI College of Law, constitutional law coursework and moot court exercises are built around exactly this kind of case — students pursuing a
Bcom LLB or BBA LLB degree break down real judgments like Puttaswamy, argue both sides, and learn to reason through a Bench's logic rather than just recall its conclusion.
Explore the LLB programmes at CFI College of Law to start building that foundation.
Full judgment text — Indian Kanoon, Justice K.S. Puttaswamy (Retd.) v. Union of India, Writ Petition (Civil) No. 494 of 2012
Case background — Supreme Court Observer, Fundamental Right to Privacy
Case analysis — Manupatra Academy, MANU/SC/1044/2017
Case summary — Wikipedia, Puttaswamy v. Union of India
