Trusted Setup
Trusted Setup Ceremony - Process and Security
This document describes the trusted setup ceremony process, security considerations, and verification methods.
Setup Ceremony
Ceremony Overview
Purpose: Generate cryptographic parameters securely.
Participants: Multiple independent parties.
Output: Proving and verifying keys.
Ceremony Process
Phase 1: Preparation
Preparation Steps:
Define circuit structure
Determine security parameters
Select participants
Prepare ceremony infrastructure
Phase 2: Contribution
Contribution Process:
Each participant contributes randomness
Parameters updated with contribution
Contribution verified
Next participant receives updated parameters
Phase 3: Verification
Verification Steps:
Verify all contributions
Check parameter structure
Validate cryptographic properties
Publish final parameters
Security Model
Security Guarantees
Guarantee: As long as at least one participant is honest, the setup is secure.
Assumption: Honest majority or one honest participant.
Threat Model
Threats:
Malicious participants
Parameter leakage
Setup manipulation
Protection:
Multi-party computation
Verifiable contributions
Transparency
Auditing
Verification
Contribution Verification
Verification Process:
Verify contribution structure
Check cryptographic properties
Validate update correctness
Publish verification
Final Verification
Final Checks:
Verify all contributions
Check final parameters
Validate security properties
Publish verification results
Transparency
Public Ceremony
Transparency Measures:
Public participation
Live streaming
Recorded ceremony
Public verification
Auditability
Audit Features:
Contribution logs
Verification records
Public parameters
Audit reports
Conclusion
Trusted setup provides:
Security: Secure parameters
Trust: Transparent process
Verification: Verifiable setup
Confidence: Trusted ceremony
Transparency: Public process
Understanding setup is essential for trust.
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