Kraken

KRAKEN is a privacy-focused data sharing platform developed as part of the European Union's Horizon 2020 program that enables secure trading of sensitive personal data while maintaining user control. The platform combines Self-Sovereign Identity (SSI), advanced cryptography, and blockchain technology to create a decentralized marketplace for personal data exchange.

The platform's core technical architecture consists of three main pillars:

• A SSI System using Hyperledger Aries protocols and W3C Verifiable Credentials for decentralized identity management
• Privacy-Preserving Analytics leveraging:
  • Secure Multi-Party Computation (SMPC)
  • Functional Encryption
  • Zero-Knowledge Proofs
  • Proxy Re-encryption
• A Data Marketplace built on:
  • Distributed ledger technology
  • Smart contracts for access control
  • The Streamr Network for real-time data sharing

The platform was demonstrated through two pilot programs:

An education pilot allowing students to securely share academic credentials with recruiters
A healthcare pilot enabling privacy-preserving sharing of medical and wellness data

Notable technical features include end-to-end encryption, decentralized access control, and full GDPR compliance. The project builds upon previous EU H2020 initiatives like CREDENTIAL and MyHealthMyData while extending their capabilities with modern cryptographic techniques. Development concluded in late 2022, with the platform's code being released as open-source software.