How do I secure my startup's customer data in India?
Key takeaways
- Data minimisation is the cheapest control: every field you do not collect is a field you never have to breach, notify or delete on request.
- CERT-In directions under section 70B require 180 days of log retention for every legal entity in India, regardless of size or sector.
- The DPDP Act 2023 requires consent, purpose limitation and a defined retention period, and breach notification duties attach to the data you hold.
- A restore test on a sample database, run quarterly, is the only reliable proof that your backup exists and is usable.
- UPI, card and identity data carry the heaviest regulatory and reputational exposure, so keep them out of application logs and analytics tools.
As of 24 October 2026: the service descriptions, prices and turnaround figures on this page are current.
How do I know what customer data I am actually holding?
Start with an inventory, because most startups do not know the answer. Pull the schema of every production database, list every field with a name, email, phone, address, government identifier, payment token or health reference, and mark each one with why you collect it, where it lives, and who can read it. Then find the copies: exports to Google Sheets, a data warehouse, a customer support tool like Zendesk or Freshdesk, an analytics platform, a marketing email tool, an engineer laptop, and a staging database that was never wiped. The copies are where the risk is, because each one usually has looser access than the primary database. A typical ten-person startup finds 3 to 7 shadow copies of customer data in the first hour of doing this properly.
How do I protect it once you know where it is?
Four layers, in order of value. Encrypt in transit with TLS 1.2 or above everywhere, including internal service-to-service calls, because flat internal networks are how lateral movement starts. Encrypt at rest, ideally with managed KMS keys and rotation, and never put a customer database on a volume that also holds general logs. Control access: enforce MFA, use role-based permissions, give every human a named individual account rather than a shared login, and review the access list every quarter. And keep the keys and the data in different places, because encryption with the key next to the data is only obfuscation. Where you must log a request, redact before it reaches the log store, since application logs are a frequent place where full customer records end up.
What does the DPDP Act 2023 require for a startup?
The practical requirements are: a clear notice about what you collect and why, a record of the consent you obtained, a stated purpose for each piece of data, a retention period, and a process to delete data when it is no longer needed or when a request is made. The Act also requires breach notification to the affected Data Protection Board and to the individuals, with timelines being notified in stages through the rules. For a startup, the near-term work is a privacy notice, a consent record for sign-up and marketing, a data inventory, and a data deletion request process that a human can actually execute. Do not treat this as a reason to collect less consent, because consent alone is not a substitute for minimisation.
What should I do about backups and deletion?
Backups need three properties to be useful against ransomware: they are off the production account, they are immutable or append-only so a compromised admin cannot silently overwrite them, and they are restore-tested. A daily snapshot copied to a separate cloud account with versioning locked is a reasonable start, and an offline copy for the most sensitive data is better. Test the restore quarterly by restoring a sample into a clean environment and checking row counts and hashes, because an untested backup fails exactly when you need it. On deletion, set retention periods so customer records actually expire, and keep a deletion log, since being able to prove deletion is part of what a regulator or a large customer will ask for.
| Control | What it looks like | Cost profile |
|---|---|---|
| Data minimisation | Schema review and removal of unused fields | Engineer days, no licence cost |
| Encryption | TLS in transit, KMS encryption at rest, separate keys | Usually a few thousand rupees a month |
| Access control | Enforced MFA, role-based permissions, quarterly review | Configuration work |
| Logging and retention | 180-day log retention with alerting on auth events | Storage cost, roughly Rs 2,000 - Rs 15,000 a month |
| Consent and privacy records | DPDP Act 2023 notice, consent log, retention schedule | Documentation, 3-7 days |
| Restore testing | Quarterly restore into a clean environment | One engineer day per quarter |
What are the frequently asked questions?
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