QuStream Documentation

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Sharded Data Storage ​

Overview ​

QuStream utilizes vertical sharding to securely store user authentication data, encryption service metadata, and access control information. Instead of storing full database entries on a single node, QuStream splits database records across multiple independent nodes, ensuring decentralization, privacy, and security.

How Vertical Sharding Works in QuStream ​

🔵 Dividing Database Entries Across Multiple Nodes ​

  • Each database record (e.g., User ID, linked devices, passphrase metadata) is split into multiple columns.
  • These columns are stored across 5-10 different nodes, ensuring that no single entity has access to full user data.
  • First set of columns → Stored on QuStream-run nodes.
  • Last set of columns → Stored on community-run nodes.

Learn More → QuStream Encryption Nodes

🔵 Security Through Data Separation ​

  • QuStream nodes store critical metadata (e.g., User IDs, account security flags).
  • Community nodes store additional linked device info, authentication logs, and hashed passphrases.
  • Even if a malicious actor gains full control over community nodes, they only have fragmented data and cannot reconstruct entire user records.
  • Similarly, QuStream itself does not have access to full authentication details, ensuring a trustless and decentralized system.

Learn More → Authenticator App & ID Security

🔵 Preventing Centralized Control & Data Breaches ​

  • No single point of failure – An attacker would need to control both QuStream’s private nodes AND all community-run nodes to reconstruct database entries.
  • Privacy-first model – Even if QuStream were compromised, it could not decrypt or reconstruct user passphrases.
  • Scalable and efficient – As user adoption grows, more nodes can be added dynamically to maintain performance and decentralization.

Why Vertical Sharding Makes QuStream Secure? ​

✅ Decentralized Authentication Data – User authentication records are distributed across multiple nodes.
✅ Quantum-Safe Architecture – Ensures data privacy, integrity, and tamper resistance.
✅ Redundant Yet Private – Even if one part of the database is attacked, the data remains incomplete and unusable.
✅ Scalability & Performance – Queries are executed efficiently, reducing congestion and increasing speed.

Conclusion ​

QuStream’s sharded data storage model ensures that authentication data, encryption metadata, and access control logs are securely distributed, decentralized, and trustless. This prevents unauthorized access, centralized control, and mass data leaks, making it the ideal architecture for post-quantum security in Web3 and enterprise applications.

Next Steps ​