Security Guide

This guide covers security best practices and implementation details for the Doxa Protocol.

Authentication & Authorization

Internet Identity Integration

public shared func authenticate(
    principal: Principal,
    signature: [Nat8]
) : async Result<Text, Text>

Role-Based Access Control

• Admin roles
• Operator roles
• User roles

Smart Contract Security

Input Validation

public func validateAmount(amount: Nat) : Bool {
    amount > 0 and amount <= MAX_AMOUNT
}

Reentrancy Protection

private var locked: Bool = false;

public shared func protectedFunction() : async Result<(), Text> {
    assert(not locked);
    locked := true;
    // Function logic
    locked := false;
}

Asset Security

Vault Management

• Multi-signature requirements
• Time-locks
• Emergency pause functionality

Collateral Safety

• Overcollateralization checks
• Liquidation thresholds
• Price feed validation

Network Security

Cross-Canister Calls

• Message authentication
• Response validation
• Timeout handling

Rate Limiting

type RateLimit = {
    requests: Nat;
    window: Int;
    lastReset: Int;
};

Monitoring & Alerts

Transaction Monitoring

• Suspicious activity detection
• Large transaction alerts
• Failed operation tracking

System Health

• Canister cycles monitoring
• Memory usage tracking
• Performance metrics

Emergency Procedures

Circuit Breakers

public shared({ caller }) func emergencyPause() : async () {
    assert(isAdmin(caller));
    systemPaused := true;
}

Recovery Process

1. Incident detection
2. System pause
3. Investigation
4. Fix implementation
5. System restoration

Security Best Practices

For Developers

1. Always validate inputs
2. Implement proper access controls
3. Use secure random number generation
4. Handle errors gracefully
5. Follow principle of least privilege

For Users

1. Use strong authentication
2. Monitor account activity
3. Keep private keys secure
4. Review transactions carefully
5. Enable notifications

Audit & Compliance

Security Audits

• Regular code audits
• Penetration testing
• Vulnerability assessments

Compliance Requirements

• Data protection
• Transaction reporting
• KYC/AML procedures

Known Issues & Mitigations

Security Roadmap

Planned Improvements

1. Hardware wallet support
2. Enhanced monitoring
3. Additional security features

Future Considerations

• Zero-knowledge proofs
• Additional audit layers
• Advanced encryption