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Layer 2 Security Analysis

· One min read
AutoSec Team
AutoSec Team
Web3 Security Researchers

Layer 2 solutions are rapidly evolving, but they also introduce new security considerations.

Layer 2 Types​

Rollups​

  • Optimistic Rollups: Optimistic execution.
  • ZK Rollups: Zero-knowledge proofs.

State Channels​

Peer-to-peer off-chain transaction channels.

Security Risks​

1. Bridging Risks​

Asset bridges between Layer 1 and Layer 2 are hotspots for attacks.

2. Sequencer Centralization​

Sequencers in most Layer 2 solutions are centralized.

Security Recommendations​

  • Understand the security models of different Layer 2 solutions.
  • Diversify assets; do not store all funds on a single Layer 2.
  • Monitor the decentralization roadmaps of projects.

Major Layer 2 Solutions​

  • Arbitrum: Optimistic Rollup.
  • Optimism: Optimistic Rollup.
  • zkSync: ZK Rollup.
  • StarkNet: ZK Rollup.

Conclusion​

Layer 2 offers scaling solutions, but it's crucial to understand their security trade-offs.