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+---
+title: "MPC Vault System Security Audit Report"
+sidebarTitle: "Executive Summary"
+description: "Comprehensive security audit findings and recommendations for the MPC vault system"
+icon: "clipboard-check"
+---
+
+<Warning>
+  This audit report contains critical security findings that require immediate
+  attention before production deployment.
+</Warning>
+
+**Date:** August 5, 2025  
+**Auditor:** Claude (Senior Security Auditor)  
+**Scope:** Comprehensive security assessment of the MPC vault system for wallet operations  
+**Version:** Sonr v0.10.15
+
+## Executive Summary
+
+This security audit evaluates the Multi-Party Computation (MPC) vault system implemented in Sonr's blockchain platform. The audit covers the current architecture, recent security improvements, wallet operation security, threat analysis, and production readiness assessment.
+
+### Key Findings Overview
+
+- **Critical Issues:** 3 identified
+- **High Risk Issues:** 4 identified
+- **Medium Risk Issues:** 6 identified
+- **Low Risk Issues:** 8 identified
+
+<Info>
+  **Overall Security Posture:** MODERATE RISK - Suitable for testnet deployment
+  with immediate remediation of critical issues required before mainnet
+  deployment with user funds.
+</Info>
+
+## 1. Current Architecture Analysis
+
+### 1.1 System Components
+
+The vault system consists of four primary components:
+
+<AccordionGroup>
+  <Accordion title="Vault Client (internal/vault/vault.go)" icon="code">
+    **Purpose:** High-level interface for vault operations using WebAssembly enclaves
+    
+    **Security Features:**
+    - Input validation framework with regex patterns
+    - Secure error handling with sanitized messages
+    - WASM plugin integrity verification via SHA256 hashing
+    - Restricted host and filesystem access for WASM plugins
+  </Accordion>
+
+<Accordion title="WASM Plugin (cmd/vault/main.go)" icon="cube">
+  **Purpose:** WebAssembly-based secure execution environment for MPC operations
+  **Security Features:** - Sandboxed execution environment - Rate limiting (60
+  operations/minute per vault) - Resource constraints (max 100 vaults per
+  instance) - Ownership-based access control - Configurable IPFS endpoints and
+  timeouts
+</Accordion>
+
+<Accordion
+  title="DWN Keeper Integration (x/dwn/keeper/keeper.go)"
+  icon="database"
+>
+  **Purpose:** Blockchain state management and vault lifecycle operations
+  **Security Features:** - Vault state persistence with enclave data separation
+  - Integration with DID-based authentication - Service registration
+  verification
+</Accordion>
+
+  <Accordion title="MPC Enclave (crypto/mpc/enclave.go)" icon="lock">
+    **Purpose:** Multi-party computation cryptographic operations
+    
+    **Security Features:**
+    - AES-GCM encryption for data at rest
+    - ECDSA signing with SHA3-256 hashing
+    - Key derivation and rotation capabilities
+  </Accordion>
+</AccordionGroup>
+
+## 2. Security Fixes Analysis
+
+### 2.1 Recently Implemented Security Improvements
+
+Based on code analysis and git history, the following security enhancements have been implemented:
+
+<CardGroup cols={2}>
+  <Card title="WASM Sandbox Restrictions" icon="check-circle" color="#16a34a">
+    ✅ **EFFECTIVE**
+    
+    - Restricted allowed hosts to local IPFS endpoints only
+    - Limited file system access to `/tmp/vault-wasm` directory
+    - Well-implemented defense against WASM plugin abuse
+  </Card>
+
+<Card title="Input Validation Framework" icon="check-circle" color="#16a34a">
+  ✅ **EFFECTIVE** - Vault ID validation with alphanumeric constraints - CID
+  validation with Base58 format checking - Password validation with UTF-8 and
+  size constraints - Comprehensive validation prevents injection attacks
+</Card>
+
+<Card title="Error Message Sanitization" icon="check-circle" color="#16a34a">
+  ✅ **EFFECTIVE** - SecureError type with public/internal error separation -
+  Structured error codes prevent information leakage - Prevents sensitive
+  information disclosure
+</Card>
+
+<Card
+  title="Rate Limiting and Resource Constraints"
+  icon="check-circle"
+  color="#16a34a"
+>
+  ✅ **EFFECTIVE** - 60 ops/minute per vault, max 100 vaults per instance -
+  Protection against resource exhaustion attacks - Well-implemented DoS
+  protection
+</Card>
+
+<Card
+  title="Plugin Integrity Verification"
+  icon="exclamation-triangle"
+  color="#f59e0b"
+>
+  ⚠️ **PARTIALLY EFFECTIVE** - Optional SHA256 hash verification - Defaults to
+  empty hash (backward compatibility) - Good foundation but needs enforcement in
+  production
+</Card>
+
+  <Card title="Access Control Implementation" icon="exclamation-triangle" color="#f59e0b">
+    ⚠️ **NEEDS IMPROVEMENT**
+    
+    - Owner-based access with pseudo-authentication
+    - Uses vault ID as owner ID (placeholder implementation)
+    - Insufficient for production use
+  </Card>
+</CardGroup>
+
+## 3. Wallet Operation Security Assessment
+
+<AccordionGroup>
+  <Accordion title="Vault Generation and Key Derivation" defaultOpen>
+    - **Strength:** Uses secure MPC protocol for key generation
+    - **Weakness:** No entropy source verification
+    - **Risk Level:** Medium
+    - **CVSS Score:** 5.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
+  </Accordion>
+
+<Accordion title="Transaction Signing (Cosmos, EVM)">
+  - **Strength:** Proper ECDSA implementation with SHA3-256 - **Weakness:**
+  Missing signature malleability protection - **Risk Level:** Medium - **CVSS
+  Score:** 4.8 (AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N)
+</Accordion>
+
+<Accordion title="Message Signing and Verification">
+  - **Strength:** Standard ECDSA verification process - **Weakness:** No
+  timestamp validation for replay protection - **Risk Level:** Medium - **CVSS
+  Score:** 5.4 (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N)
+</Accordion>
+
+<Accordion title="Key Rotation and Vault Management">
+  - **Strength:** MPC refresh protocol for key rotation - **Weakness:** No
+  automated rotation enforcement - **Risk Level:** Low - **CVSS Score:** 3.7
+  (AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)
+</Accordion>
+
+  <Accordion title="IPFS Storage and Retrieval">
+    - **Strength:** AES-GCM encryption for data at rest
+    - **Weakness:** No integrity verification after retrieval
+    - **Risk Level:** High
+    - **CVSS Score:** 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
+  </Accordion>
+</AccordionGroup>
+
+## 4. Threat Analysis by Risk Level
+
+### 4.1 CRITICAL Vulnerabilities (Immediate Action Required)
+
+<Warning>
+  These vulnerabilities require immediate remediation before any production
+  deployment.
+</Warning>
+
+<AccordionGroup>
+  <Accordion title="CRITICAL-001: Weak Authentication System" icon="shield-x">
+    - **Location:** `cmd/vault/main.go:647-676`
+    - **Issue:** Pseudo-authentication using vault ID as owner ID
+    - **Impact:** Complete vault takeover by any user knowing vault ID
+    - **CVSS Score:** 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
+    - **Remediation:** Implement proper JWT/OAuth2 authentication with cryptographic proofs
+  </Accordion>
+
+<Accordion
+  title="CRITICAL-002: Missing WASM Integrity Enforcement"
+  icon="shield-x"
+>
+  - **Location:** `internal/vault/vault.go:138` - **Issue:** WASM hash
+  verification disabled by default (empty ExpectedSHA256) - **Impact:**
+  Malicious WASM plugin execution - **CVSS Score:** 9.1
+  (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N) - **Remediation:** Enforce mandatory
+  WASM integrity checks in production
+</Accordion>
+
+  <Accordion title="CRITICAL-003: Hardcoded Default Passwords" icon="shield-x">
+    - **Location:** `x/dwn/keeper/keeper.go:404`
+    - **Issue:** Default password generation based on predictable values
+    - **Impact:** Vault encryption key compromise
+    - **CVSS Score:** 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
+    - **Remediation:** Implement secure password derivation or user-provided passwords
+  </Accordion>
+</AccordionGroup>
+
+### 4.2 HIGH Risk Vulnerabilities
+
+<AccordionGroup>
+  <Accordion title="HIGH-001: No Encrypted Data Integrity Verification" icon="alert-triangle">
+    - **Location:** `crypto/mpc/enclave.go:51-68`
+    - **Issue:** No HMAC or authenticated encryption verification after IPFS retrieval
+    - **Impact:** Data tampering attacks on stored vault data
+    - **CVSS Score:** 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
+  </Accordion>
+
+<Accordion
+  title="HIGH-002: Missing Signature Malleability Protection"
+  icon="alert-triangle"
+>
+  - **Location:** `crypto/mpc/enclave.go:111-121` - **Issue:** ECDSA signatures
+  vulnerable to malleability attacks - **Impact:** Transaction replay with
+  modified signatures - **CVSS Score:** 7.4
+  (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N)
+</Accordion>
+
+<Accordion
+  title="HIGH-003: Insufficient Input Sanitization for IPFS Operations"
+  icon="alert-triangle"
+>
+  - **Location:** `cmd/vault/main.go:321-392` - **Issue:** Direct CID usage
+  without additional validation - **Impact:** IPFS injection attacks or resource
+  exhaustion - **CVSS Score:** 7.1 (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
+</Accordion>
+
+  <Accordion title="HIGH-004: Race Conditions in Concurrent Vault Access" icon="alert-triangle">
+    - **Location:** `cmd/vault/main.go:505-568`
+    - **Issue:** Inadequate synchronization for concurrent vault operations
+    - **Impact:** Data corruption or inconsistent vault state
+    - **CVSS Score:** 6.8 (AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H)
+  </Accordion>
+</AccordionGroup>
+
+### 4.3 MEDIUM Risk Vulnerabilities
+
+<AccordionGroup>
+  <Accordion title="MEDIUM-001: Weak Key Derivation for Encryption">
+    - **Location:** `crypto/mpc/enclave.go:78`
+    - **CVSS Score:** 5.9 (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)
+  </Accordion>
+
+<Accordion title="MEDIUM-002: Missing Request Replay Protection">
+  - **Location:** Various signing functions - **CVSS Score:** 5.4
+  (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N)
+</Accordion>
+
+<Accordion title="MEDIUM-003: Insufficient Error Context in Logs">
+  - **Location:** Throughout codebase - **CVSS Score:** 4.3
+  (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L)
+</Accordion>
+
+<Accordion title="MEDIUM-004: No Key Rotation Enforcement">
+  - **Location:** `cmd/vault/main.go:986-988` - **CVSS Score:** 4.2
+  (AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N)
+</Accordion>
+
+<Accordion title="MEDIUM-005: WebAuthn Implementation Placeholder">
+  - **Location:** `cmd/vault/main.go:947-954` - **CVSS Score:** 5.8
+  (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
+</Accordion>
+
+  <Accordion title="MEDIUM-006: Insufficient Resource Cleanup">
+    - **Location:** `cmd/vault/main.go:976-983`
+    - **CVSS Score:** 4.9 (AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L)
+  </Accordion>
+</AccordionGroup>
+
+### 4.4 LOW Risk Issues
+
+<Accordion title="Low Risk Issues Summary">
+  - LOW-001: Predictable Enclave ID Generation - LOW-002: Missing Rate Limit
+  Bypass Protection - LOW-003: Insufficient Logging for Security Events -
+  LOW-004: No Vault Backup/Recovery Mechanism - LOW-005: Missing Health Check
+  Attestation Validation - LOW-006: Hardcoded Configuration Values - LOW-007: No
+  Circuit Breaker for IPFS Operations - LOW-008: Missing Input Length Validation
+  Edge Cases
+</Accordion>
+
+## 5. Production Readiness Assessment
+
+<CardGroup cols={3}>
+  <Card title="Testnet Deployment" icon="exclamation-triangle" color="#f59e0b">
+    ⚠️ **CONDITIONAL APPROVAL**
+    
+    Suitable with immediate critical fixes:
+    - Fix CRITICAL-001 (Authentication)
+    - Fix CRITICAL-002 (WASM Integrity)
+    - Fix CRITICAL-003 (Default Passwords)
+    
+    **Timeline:** 2-3 weeks with dedicated security effort
+  </Card>
+
+<Card title="Mainnet with User Funds" icon="x-circle" color="#dc2626">
+  ❌ **NOT RECOMMENDED** Requires comprehensive security hardening: - All
+  CRITICAL and HIGH issues resolved - External security audit by certified firm
+  - Bug bounty program - Comprehensive monitoring and alerting **Timeline:** 3-4
+  months minimum
+</Card>
+
+  <Card title="Enterprise/Institutional Use" icon="x-circle" color="#dc2626">
+    ❌ **NOT RECOMMENDED**
+    
+    Requires enterprise-grade security controls:
+    - SOC 2 Type II compliance
+    - Multi-signature authorization workflows
+    - Hardware Security Module (HSM) integration
+    - Advanced threat detection and response
+    
+    **Timeline:** 6-8 months minimum
+  </Card>
+</CardGroup>
+
+## 6. Remediation Recommendations
+
+### 6.1 Immediate Actions (0-2 weeks)
+
+<Steps>
+  <Step title="Implement Proper Authentication System">
+    - Replace pseudo-authentication with JWT/OAuth2
+    - Add cryptographic proof of vault ownership
+    - Implement session management with timeout
+  </Step>
+
+<Step title="Enforce WASM Integrity Verification">
+  - Remove backward compatibility for empty hashes - Implement automatic hash
+  verification - Add WASM signature verification
+</Step>
+
+  <Step title="Replace Hardcoded Password Generation">
+    - Implement secure key derivation functions (PBKDF2/Argon2)
+    - Add user-provided password support
+    - Implement password strength requirements
+  </Step>
+</Steps>
+
+### 6.2 Short-term Actions (2-8 weeks)
+
+<Steps>
+  <Step title="Add Data Integrity Verification">
+    - Implement HMAC for IPFS stored data
+    - Add checksum verification after retrieval
+    - Implement authenticated encryption (AES-GCM with additional data)
+  </Step>
+
+<Step title="Implement Signature Malleability Protection">
+  - Use deterministic ECDSA (RFC 6979) - Add signature canonicalization -
+  Implement proper nonce generation
+</Step>
+
+  <Step title="Enhance WebAuthn Integration">
+    - Complete WebAuthn assertion verification
+    - Add biometric authentication support
+    - Implement proper challenge-response flow
+  </Step>
+</Steps>
+
+## 7. Implementation Timeline
+
+<AccordionGroup>
+  <Accordion title="Phase 1: Critical Security Fixes (2-3 weeks)" defaultOpen>
+    - Authentication system implementation
+    - WASM integrity enforcement
+    - Password security enhancement
+    - Basic monitoring setup
+  </Accordion>
+
+<Accordion title="Phase 2: High-Risk Remediation (4-6 weeks)">
+  - Data integrity verification - Signature security improvements - Input
+  validation enhancements - Concurrent access protection
+</Accordion>
+
+<Accordion title="Phase 3: Production Hardening (8-12 weeks)">
+  - Comprehensive monitoring implementation - Advanced security controls -
+  Performance optimization - External security audit preparation
+</Accordion>
+
+  <Accordion title="Phase 4: Enterprise Readiness (6-8 months)">
+    - Compliance framework implementation
+    - Advanced threat protection
+    - HSM integration
+    - Comprehensive testing and validation
+  </Accordion>
+</AccordionGroup>
+
+## 8. Compliance and Standards Assessment
+
+### 8.1 Current Compliance Status
+
+<CardGroup cols={2}>
+  <Card title="OWASP Top 10" icon="x-circle" color="#dc2626">
+    ❌ Multiple violations identified
+  </Card>
+  <Card title="NIST Cybersecurity Framework" icon="x-circle" color="#dc2626">
+    ❌ Partial implementation
+  </Card>
+  <Card title="ISO 27001" icon="x-circle" color="#dc2626">
+    ❌ Insufficient security controls
+  </Card>
+  <Card title="SOC 2" icon="x-circle" color="#dc2626">
+    ❌ Not compliant
+  </Card>
+</CardGroup>
+
+### 8.2 Recommended Standards Implementation
+
+1. Implement OWASP secure coding practices
+2. Adopt NIST cybersecurity framework controls
+3. Prepare for SOC 2 Type II audit
+4. Consider ISO 27001 certification for enterprise use
+
+## 9. Conclusion
+
+The Sonr MPC vault system demonstrates good architectural principles and has implemented several important security improvements. However, critical vulnerabilities prevent immediate production deployment with user funds.
+
+<Note>
+  The system is suitable for testnet deployment with immediate remediation of
+  the three critical issues identified. A comprehensive security hardening
+  effort over 3-4 months is required before mainnet deployment with user funds
+  is recommended.
+</Note>
+
+<Warning>
+  **Immediate Priority:** Address the three critical vulnerabilities before any
+  production deployment.
+</Warning>
+
+**Recommendation:** Engage a certified security firm for external audit before mainnet launch.
+
+---
+
+**Report Prepared By:** Claude (Senior Security Auditor)  
+**Date:** August 5, 2025  
+**Classification:** Confidential - Internal Use Only
+