The New Normal: A Tsunami of Biometric Data
In India, biometric data has quietly become the new currency of identity. What started with Aadhaar, the world's largest biometric database, has now cascaded into nearly every facet of life. We use our fingerprints and faces for banking via Video-KYC,
to mark attendance at work, and to breeze through airports with DigiYatra. The recent integration of biometric authentication into the Unified Payments Interface (UPI) marks another significant milestone, weaving our most unique physical traits into the fabric of daily commerce. This proliferation, driven by convenience and the promise of security, means that copies of our unchangeable personal data are being collected and held by a vast and growing number of public and private entities. Each new use case adds another server, another database, where our biometric identities reside, expanding our collective digital footprint into uncharted territory.
The Permanence Problem: A Risk Unlike Any Other
The core danger of biometric data lies in its permanence. You can reset a password or get a new credit card number, but you cannot change your fingerprints or your iris pattern. If a database containing this information is breached, the consequences are lifelong. Stolen biometric data can be used for identity theft, fraud, and unauthorized surveillance in ways that are difficult, if not impossible, to undo. There is also the risk of 'function creep', where data collected for one specific purpose is later repurposed for another without explicit consent. For instance, data collected for a welfare scheme could potentially be used for commercial profiling or monitoring, a concern the Supreme Court has previously highlighted. Holding onto this data indefinitely creates a permanent, high-value target for cybercriminals and a tool for potential overreach, turning a key for authentication into a key that can never be thrown away.
The Law's Intent: A Foundation Is Not a Fortress
India's Digital Personal Data Protection (DPDP) Act, 2023, is a crucial step forward. It establishes vital principles, classifying biometric information as sensitive data that requires explicit, informed consent for processing. The Act champions 'purpose limitation'—meaning data should only be used for the reason it was collected—and 'data minimisation'. Crucially, it enshrures the right to have data erased once its purpose is fulfilled. However, the Act provides a framework, not a detailed rulebook for every scenario. It states data should not be retained for longer than is required, but it leaves the definition of 'required' open to interpretation. This ambiguity is where the risk lies. Without clear, sector-specific mandates on how long data can be stored after an employee leaves a company, a customer closes an account, or a visitor leaves a building, the spirit of the law can be undermined by inaction or self-serving corporate policies.
Defining the Expiry Date for Our Data
This is why simply having a data protection law is not enough; we need explicit, enforceable data retention policies. These policies must translate the DPDP Act's principles into concrete, auditable rules. For every instance of biometric collection, there must be a pre-defined and clearly communicated expiry date. For example, a company's policy should state that a former employee's biometric data will be verifiably deleted within 30 days of their departure, unless a specific legal hold requires otherwise. Visitor data should be purged at the end of the day. The 'right to be forgotten' needs to evolve into an automated, default process of deletion. Avoiding storage altogether, by processing biometrics on a user's own device wherever possible, remains the gold standard for privacy. When storage is necessary, the onus must be on the data collector to justify not just its collection, but its continued existence on their servers.
