Realizing Corrupted-Shard Tolerance: A Sharding Blockchain with Preserving Global Resilience

What is it about?

Blockchain sharding is a promising approach to enhancing scalability by partitioning the network into smaller, parallel shards. However, existing sharding blockchains that rely on Byzantine fault tolerance protocols require large shard sizes to meet strict security thresholds, limiting scalability, while relaxing security parameters can lead to liveness and safety violations. In this work, we present Camael, a secure sharding blockchain that achieves corrupted-shard tolerance through effective detection and processing mechanisms for both liveness and safety violations. Notably, Camael ensures security while preserving a global fault tolerance of 1/3 and tolerating corrupted shards, with each shard accommodating up to 2/3 malicious nodes.

Featured Image

Photo by Shubham Dhage on Unsplash

Photo by Shubham Dhage on Unsplash

Why is it important?

By integrating the liveness violation and safety violation processing methods with conviction, our design safeguards system security with malicious node conviction and transaction settlement responsiveness.