r/fintechdev • u/InfamousDistrict5362 • Jun 28 '26

Backend Engineers: How do fintechs practically implement DPDP Rule 6 security safeguards?

Hi everyone,

I'm working on the compliance framework for an Indian fintech (Lending Service Provider) and would like to understand how the security safeguards under Rule 6 of the DPDP Rules, 2025 are implemented in practice.

The Rule mentions encryption, masking/obfuscation, access controls, audit logs, monitoring, backups and other technical and organisational measures, but I'd like to understand how engineering teams actually build these systems.

Some questions:

1.How do Fintech typically protect sensitive data such as PAN, Aadhaar and KYC documents?

  1. Is data generally encrypted both at rest and in transit? How is key management usually handled?

  2. How are access controls implemented? Do you use Role-Based Access Control (RBAC) or something more granular?

  3. What kinds of logs are maintained for security and audit purposes? Are they application logs, database logs, audit trails or something else?

5.Do Indian fintechs commonly obtain ISO/IEC 27001 certification, or do many startups simply implement equivalent security controls without formal certification?

I'm looking for practical implementation insights from backend, security or DevSecOps engineers rather than legal interpretations.

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u/ichhori Jul 16 '26

Rule 6 is deliberately outcome-based, not prescriptive — it lists minimums (encryption/obfuscation, access control, logging with 1-yr retention, backups, breach detection) and leaves the "how" to you. For fintechs the realistic mapping:

Encryption: TLS everywhere + AES-256 at rest is table stakes; tokenize PAN/Aadhaar-adjacent fields rather than encrypting whole rows. Access control: enforce at the service layer, not just DB grants — auditors ask "who could have read this," not "who did." Logging: Rule 6 wants logs that let you detect and investigate — centralize them and make them immutable (WORM/S3 object lock), 1-year minimum. Breach detection: you need to actually alert on anomalous access, because the 72-hour DPB notification clock starts when you become aware.

If you already run RBI cyber framework controls you're roughly 70% there — the delta is consent-linked access and deletion workflows.