Examine how the *Puttaswamy* privacy doctrine constrains routine police surveillance of public protests in India.

In K.S. Puttaswamy v. Union of India (2017), a nine-judge Bench held privacy to be a fundamental right intrinsic to Article 21 and flowing across Part III [2]. Routine, continuous police filming of protesters therefore ceases to be a mere administrative measure and becomes a rights-restricting act that must survive constitutional scrutiny.

How the doctrine constrains surveillance

• Legality: any privacy intrusion needs a backing law, not executive discretion. Blanket videography without a disclosed statutory basis fails at the first step — the core grievance in the pending Delhi High Court plea against surveillance of the Jantar Mantar sit-in.
• Legitimate aim and necessity: public order under Article 19(2)/(3) is a valid aim, but surveillance must be needed for it, not routine [1]. A "real and imminent threat" test replaces standing observation.
• Proportionality and least intrusive means: measures must be the narrowest available; a permanent surveillance tower trained on peaceful assembly is disproportionate to any speculative risk.
• Procedural safeguards: Puttaswamy requires oversight against arbitrary use [2]. Purpose limitation, storage limitation and data minimisation now also anchor the Digital Personal Data Protection Act, 2023 [4].
• Chilling effect on Article 19: privacy protects the anonymity that makes dissent possible; identifiable recording deters lawful participation, so Articles 19(1)(a), 19(1)(b) and 21 are read together [1].

Limits of the constraint

• Protest rights are not absolute; Amit Sahni v. Commissioner of Police (2020) upheld regulation of indefinite occupation of public spaces [3].
• Reduced privacy expectation in public places is often pleaded by the State.
• The DPDP Act exempts State agencies widely for offence prevention, weakening remedies [4].
• Enforcement remains case-by-case, absent surveillance-specific statutory guidelines.

Puttaswamy thus converts protest surveillance from an unreviewable police prerogative into a proportionality question. The durable remedy is legislative: a surveillance statute with defined triggers, retention and deletion norms, and independent oversight. Such a framework would secure public order while honouring the constitutional promise of liberty and dignity that makes peaceful dissent a democratic safety valve.