Building a Zero-Trust, GDPR-Compliant Document Vault in Rust

RESULT

▫️Unauthorized access attempts: Down 99.9% with zero-trust enforcement
▫️ Document access time: Reduced by 40% via streaming + caching
▫️ GDPR & ISO 27001 audits: Passed with zero security issues
▫️ 100% of sensitive data encrypted in transit & at rest — no server-side keys, ever
▫️ Immutable audit trails — backed by Merkle chains and optional private blockchain

THE CLIENT

- A confidential financial services conglomerate operating across Germany, France, and the Netherlands — with strict regulatory requirements and high-stakes data handling needs.

THE PROBLEM

▫️Their document systems weren’t built for modern security. Sensitive financial and legal files were scattered, exposed, and slow to access.
▫️Access control was inconsistent, and insider threats were rising.
▫️Compliance audits were a fire drill every quarter.
▫️No cryptographic guarantees for multi-party workflows.
▫️Legacy infra couldn’t support zero-trust or immutable logging.

OUR SOLUTION

We built a zero-trust document vault from scratch in Rust — combining encrypted storage, zero-knowledge access control, and blockchain-backed audit logging.
Key Systems We Integrated:
▫️ Rust-native encryption (age, ring) for client-side file protection
▫️ arkworks-rs for zero-knowledge membership proofs
▫️ Merkle-tree logging with optional Substrate or Hyperledger support
▫️ Multi-party access control via cryptographic signatures
▫️ Fully modular, blockchain-ready architecture

BOTTOM LINE

▫️We helped this financial powerhouse turn compliance chaos into cryptographic certainty — and delivered a vault that actually earns the name.
▫️No backdoors. No bottlenecks. Just bulletproof privacy and performance, by design.

GET STARTED

If you would like to work with us or just want to get in touch, we’d love to hear from you!

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