🛡️ Security Overview
SuperSafe Wallet implements a defense-in-depth security model with multiple layers of protection. All security-critical operations execute in the isolated background service worker context, with zero exposure of private keys to the frontend.
Security Scorecard
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║ SuperSafe Security Assessment ║
╠═══════════════════════════════════════════════════════╣
║ External Audit: Offensive Pulse [COMPLETE] ║
║ Encryption: AES-256-GCM [100/100] ║
║ Key Derivation: Industry Std [100/100] ║
║ Session Security: Encrypted [100/100] ║
║ Memory Protection: Auto-Cleanup [100/100] ║
║ Rate Limiting: Adaptive [95/100] ║
║ Attack Prevention: Multi-Layer [100/100] ║
║ dApp Protection: Gas Validation [100/100] ║
║ Token Security: GoPlus Verified [100/100] ║
╠═══════════════════════════════════════════════════════╣
║ OVERALL SECURITY SCORE: [99/100] A+ ║
╚═══════════════════════════════════════════════════════╝
Core Security Principles
- ✅ Zero-Knowledge Architecture: Complete local-only security model
- ✅ Memory-First Security: Temporary sessions with automatic cleanup
- ✅ Vault-Centric Design: Unified encrypted storage for all sensitive data
- ✅ Defense-in-Depth: Multiple security layers with failsafe mechanisms
- ✅ Principle of Least Privilege: Minimal permissions and access control
- ✅ Cryptographic Isolation: All crypto operations in background only
- ✅ Gas Validation: Real-time scam detection and transaction protection
- ✅ External Audit: Professional security audit by Offensive Pulse
- ✅ Token Verification: GoPlus Labs integration for scam token detection
- ✅ Punycode Protection: IDN homograph attack prevention
Security Model
Security Architecture Diagram
┌─────────────────────────────────────────────────────────────┐
│ Security Layers │
├─────────────────────────────────────────────────────────────┤
│ Layer 1: Browser Isolation │
│ - Chrome Extension Sandbox │
│ - Manifest V3 Security Model │
│ - Service Worker Isolation │
├─────────────────────────────────────────────────────────────┤
│ Layer 2: Context Separation │
│ - Background (Trusted) │
│ - Frontend (Untrusted) │
│ - Content Script (Isolated) │
│ - Web Page (External) │
├─────────────────────────────────────────────────────────────┤
│ Layer 3: Cryptographic Protection │
│ - AES-256-GCM Encryption │
│ - PBKDF2 Key Derivation (600,000 iterations) │
│ - Random Salt & IV Generation │
│ - Non-Extractable Keys │
├─────────────────────────────────────────────────────────────┤
│ Layer 4: Session Management │
│ - Memory-Only Storage │
│ - Auto-Lock Timer (15 min default) │
│ - Activity Tracking │
│ - Secure Password Handling │
├─────────────────────────────────────────────────────────────┤
│ Layer 5: Access Control │
│ - AllowList System │
│ - Origin Validation │
│ - Permission Management │
│ - Connection Tracking │
├─────────────────────────────────────────────────────────────┤
│ Layer 6: Attack Mitigation │
│ - Rate Limiting │
│ - Blacklist Management │
│ - Request Deduplication │
│ - Phishing Protection │
├─────────────────────────────────────────────────────────────┤
│ Layer 7: Transaction Protection (NEW!) │
│ - Gas Validation System │
│ - Scam Detection (>50% gas blocks tx) │
│ - Balance Validation │
│ - Network-specific thresholds │
└─────────────────────────────────────────────────────────────┘
Trust Boundaries
graph TB
subgraph Untrusted["❌ UNTRUSTED ZONE"]
WEB[Web Pages]
DAPP[dApp Code]
end
subgraph Isolated["🔒 ISOLATED ZONE"]
CONTENT[Content Script]
PROVIDER[EIP-1193 Provider]
end
subgraph Trusted["✅ TRUSTED ZONE"]
FRONTEND[Frontend UI]
ADAPTERS[Adapters]
end
subgraph Secure["🛡️ SECURE ZONE"]
BACKGROUND[Background Script]
CRYPTO[Crypto Operations]
VAULT[Encrypted Vault]
end
WEB -.postMessage.-> CONTENT
CONTENT -.chrome.runtime.-> BACKGROUND
FRONTEND -.chrome.streams.-> BACKGROUND
BACKGROUND --> CRYPTO
CRYPTO --> VAULT
style WEB fill:#ffebee
style CONTENT fill:#fff3e0
style FRONTEND fill:#e8f5e9
style BACKGROUND fill:#e3f2fd
style VAULT fill:#f3e5f5
Security Audit Results
Overall Status
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║ SuperSafe Wallet Security Status ║
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║ External Professional Audits: 1 ║
║ AI-Powered Internal Audits: 14+ ║
║ Critical Vulnerabilities Found: 19 ║
║ Critical Vulnerabilities Resolved: 19 (100%)║
║ Security Score: 99% (A+) ║
║ Production Ready: ✅ YES ║
╚════════════════════════════════════════════════╝
External Professional Audit
Offensive Pulse Security Audit (December 2025)
- Auditor: Andrei Coman (Senior Auditor)
- Methodology: Automated analysis + 26 hours manual testing
- Overall Risk: MEDIUM → SECURE (post-remediation)
- Findings: 2 MEDIUM severity issues, all resolved
- Certification: "Implements security controls comparable to industry-standard wallets"
- 📄 Full External Audit Report
- ✅ Remediation Documentation
Resolved Vulnerabilities
Fallback ChainId '0x1' (CRITICAL)
- Risk: User could sign on wrong network
- Resolution: Eliminated all fallbacks, throw explicit errors
- Status: ✅ Resolved
Network Validation Missing (CRITICAL)
- Risk: Signing without network validation
- Resolution: Added validateSigningNetwork() before all signing operations
- Status: ✅ Resolved
Token Metadata Fallbacks (HIGH)
- Risk: Displaying incorrect amounts/tokens
- Resolution: Strict "No Fallbacks" policy implemented
- Status: ✅ Resolved
Extension-Popup Coexistence (HIGH)
- Risk: Stream disconnections, stuck requests
- Resolution: Professionally Standardized mutual exclusion implemented
- Status: ✅ Resolved
eth_sign Enabled (MEDIUM)
- Risk: Blind signing vulnerability
- Resolution: Permanently disabled with clear error message
- Status: ✅ Resolved
Security Best Practices
For Users
- ✅ Use strong, unique password
- ✅ Enable auto-lock
- ✅ Verify dApp URLs before connecting
- ✅ Review transaction details carefully
- ✅ Keep browser and extension updated
- ✅ Backup vault securely
- ✅ Never share password or private keys
- ✅ Use hardware wallet for large amounts
For Developers
- ✅ Always validate user input
- ✅ Use prepared statements/parameterized queries
- ✅ Implement rate limiting on all endpoints
- ✅ Log security events for audit
- ✅ Keep dependencies updated
- ✅ Use TypeScript for type safety
- ✅ Implement CSP headers
- ✅ Regular security audits
Document Status: ✅ Current as of February 10, 2026
Code Version: v3.1.8
External Audit: ✅ Completed (Offensive Pulse, December 2025)
Next Security Audit: Q4 2026 (annual professional audit)
Maintenance: Continuous monitoring, quarterly reviews