Prove what's true —
reveal only what's needed
Selective disclosure with BBS+ signatures and ZK proofs. Let a verifier confirm 'this person is over 21' or 'this graduate holds a B.Tech from an accredited institution' — without exposing name, date of birth, or anything else.
Why teams choose this solution
Selective Disclosure
Share only the claims that matter for a given transaction — university name without grades, or degree level without university.
Holder Consent Recorded
Every disclosure is cryptographically signed by the holder — irrefutable consent trail for compliance.
No Personal Data On-Chain
The chain stores only proofs and hashes — personal identifiers live in the holder's wallet, encrypted.
Verifier-Side Privacy
Even Gradify can't see what's being verified — proofs are checked locally in the verifier's app.
Anonymous Credentials
Prove membership in a set (e.g. 'enrolled student of an IIT') without revealing which one.
Predicate Proofs
Prove conditional facts ('CGPA > 8.5') without revealing the exact value.
Slots into your existing stack
BBS+ credentials issued via Gradify land in DigiLocker for citizen-controlled disclosure.
Standards-compliant — works with any VC 2.0-aware verifier worldwide.
Drop a verification widget into any web app — proof-checking happens client-side.
Native wallet apps for issuance, storage, and proof generation on-device.
Standards-aligned with OpenID for Verifiable Presentations.
Encrypted, peer-to-peer credential exchange channel.
Deep-tech, built in India
Production-grade primitives composed into a single coherent platform.
BBS+ Signatures
RFC-track signature scheme designed for selective disclosure with linkability control.
ZK-SNARKs (Groth16 / PLONK)
Succinct, non-interactive proofs for arbitrary predicates over credential attributes.
Hardware Security Modules
HSM-backed issuer keys with quarterly rotation and split-knowledge custody.
Pairing-Friendly Curves
BLS12-381 for BBS+ operations — battle-tested in Zcash, Filecoin, Ethereum 2.
Avoid the ₹250 cr DPDP penalty exposure
India's DPDP Act 2023 penalises personal-data breaches up to ₹250 crore. ZK verification eliminates the data you'd otherwise need to expose, audit, and protect.
Penalty maxima per Section 33 of the DPDP Act 2023 — actual exposure depends on volume + categorisation of personal data.
The competitive edge
DPDP-Native
Privacy by design, not by patch — built around India's Digital Personal Data Protection Act.
Combinable Proofs
Stack multiple credentials into a single ZK proof — 'over 21 AND graduate of an IIT AND resident of Karnataka'.
Quantum-Aware Roadmap
Active research on post-quantum BBS+ alternatives — your verification stays valid as cryptography evolves.
Audit-Friendly
Every proof generation logged with the holder's signed consent — defensible under regulatory scrutiny.
Questions teams ask before adopting
Is BBS+ production-ready?+
How fast is proof generation?+
Can we use ZK proofs without BBS+?+
Are these proofs reusable?+
How does this map to DPDP / GDPR?+
Ready to deploy this solution?
Talk to our team — we'll walk through your specific workflow and share a tailored implementation plan.