---
title: "Puttaswamy Judgment: Right to Privacy in India"
description: "The K. S. Puttaswamy Case established privacy as a fundamental right under Article 21, impacting laws on state surveillance in India."
url: "https://modeldiplomat.com/learn/glossary/puttaswamy-judgment-right-to-privacy"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- The K.
- S.
- Which earlier judgments did the Puttaswamy case overrule?
- What is the proportionality test established by Puttaswamy?
- How did Puttaswamy affect the Aadhaar programme?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

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In September 2018, a five-judge Supreme Court bench applied Puttaswamy's proportionality test to uphold the Aadhaar Act while striking down Section 57, which had let private firms demand Aadhaar-based authentication.

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