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title Vendor: Shutter
status draft
maturity production

Shutter Network – Encrypted Mempool & MEV Protection

Category: Privacy Infrastructure
Maturity: Pilot/Production (Gnosis Chain)
Focus: Pre-trade privacy through encrypted mempools and threshold decryption

Overview

Shutter Network provides encrypted mempool infrastructure that prevents MEV extraction and front-running by encrypting transactions until they are included in blocks, using threshold cryptography for decryption.

Key Use Cases / Patterns

Technical Approach

Shutter uses threshold encryption where:

  • Transaction Encryption: Users encrypt transactions with a shared public key
  • Distributed Decryption: Network of validators collectively decrypt transactions after block inclusion
  • MEV Prevention: Searchers cannot see transaction content during the vulnerable mempool phase
  • Ordering Protection: Prevents front-running while maintaining transaction validity

What It Provides

  • Encrypted mempool preventing MEV extraction during broadcasting
  • Threshold decryption ensuring no single point of failure
  • Integration with existing Ethereum infrastructure
  • Censorship resistance through distributed key management

What It Doesn't Cover

  • Post-execution privacy (transactions visible after inclusion)
  • Cross-chain MEV protection
  • Complex intent expression (focuses on transaction-level protection)

Integration Notes

  • Networks: Live on Gnosis Chain, Ethereum integration planned
  • Compatibility: Works with standard Ethereum transactions
  • Validator Requirements: Requires network of threshold key holders
  • Developer Experience: Minimal changes to existing dApp integration

Strengths

  • Proven solution with mainnet deployment
  • Strong cryptographic foundations (threshold encryption)
  • Minimal impact on existing Ethereum workflows
  • Effective MEV prevention during critical mempool phase

Limitations

  • Limited to supported networks (Gnosis Chain currently)
  • Adds latency due to threshold decryption process
  • Requires coordination among threshold key holders
  • No protection against MEV after transaction execution

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