Hetu Checkpoint
Hetu Checkpoint is a secure and efficient checkpointing system that leverages Distributed Key Generation (DKG) and BLS signatures to prevent long-range attacks on blockchain networks.
Overview
Hetu Checkpoint creates secure checkpoints for multiple blocks using a network of validators. These checkpoints are then anchored to Ethereum, providing an additional layer of security and finality.
Key Features
Epoch-based Checkpointing: Divides blockchain into epochs with fixed validator sets
DKG Integration: Secure distributed key generation for validator coordination
BLS Signatures: Efficient aggregated signatures for checkpoint creation
Ethereum Anchoring: Checkpoint hashes are recorded on Ethereum
Long-range Attack Prevention: Enhanced security through periodic checkpointing
System Components
Validator Network
Distributed network of validators Consensus on checkpoint generation BLS signature aggregation
DKG System
Secure key generation Validator coordination Threshold signature scheme
Checkpoint Generation
Aggregates multiple blocks Creates unified checkpoint hash BLS signature verification
Ethereum Bridge
Submits checkpoint hashes to Ethereum Provides immutable checkpoint records Enables cross-chain verification
Technical Details
Epoch Configuration
Fixed number of blocks per epoch Consistent validator set within each epoch Configurable epoch parameters
Security Features
BLS Signatures: Efficient signature aggregation Reduced communication overhead Strong cryptographic security
DKG Protocol: Distributed trust model No single point of failure Threshold-based security
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