At MAK Platform, security is our top priority. We're committed to protecting user assets, data, and privacy. This document outlines our security practices and how to report vulnerabilities responsibly.

• Supported Versions
• Reporting a Vulnerability
• Security Measures
• Smart Contract Security
• Bug Bounty Program
• Security Best Practices
• Incident Response
• Compliance

We actively support and provide security updates for the following versions:

Note: We strongly recommend always using the latest stable version.

DO NOT create public GitHub issues for security vulnerabilities.

If you discover a security vulnerability, please report it responsibly:

Primary: Email security issues to andrewk529@protonmail.com

Subject Line Format: [SECURITY] Brief description

Please provide as much information as possible:

1. Vulnerability Type

   • Smart contract vulnerability
   • Frontend/backend security issue
   • Authentication/authorization bypass
   • Data exposure
   • Other (specify)

2. Severity Assessment (your opinion)

   • Critical (immediate threat to user funds/data)
   • High (significant security risk)
   • Medium (limited impact)
   • Low (minimal risk)

3. Detailed Description

   • Clear explanation of the vulnerability
   • Affected components/contracts
   • Potential impact and attack scenarios

4. Reproduction Steps

   • Step-by-step instructions to reproduce
   • Required conditions or setup
   • Expected vs. actual behavior

5. Proof of Concept

   • Code snippets (if applicable)
   • Screenshots or videos
   • Test environment details

6. Suggested Remediation

   • Proposed fix (if you have one)
   • Alternative solutions
   • Mitigation strategies

Subject: [SECURITY] Reentrancy vulnerability in PropertyMarketplace

**Vulnerability Type:** Smart Contract Vulnerability

**Severity:** Critical

**Description:**
The PropertyMarketplace.purchaseShares() function is vulnerable to 
reentrancy attacks. An attacker can drain funds by recursively calling 
the function before state updates complete.

**Affected Component:**
- Contract: PropertyMarketplace.sol
- Function: purchaseShares()
- Lines: 145-160

**Reproduction Steps:**
1. Deploy malicious contract with fallback function
2. Call purchaseShares() with malicious contract
3. Fallback function calls purchaseShares() again
4. Repeat until target funds are drained

**Proof of Concept:**
[Attach PoC code or link to private repository]

**Impact:**
- Complete drainage of marketplace funds
- Loss of user assets
- Platform reputation damage

**Suggested Fix:**
Implement ReentrancyGuard from OpenZeppelin and follow 
checks-effects-interactions pattern:

```solidity
function purchaseShares(uint256 listingId, uint256 shares) 
    external 
    payable 
    nonReentrant {
    // Checks
    require(shares > 0, "Invalid shares");
    
    // Effects
    listing.shares -= shares;
    
    // Interactions
    propertyToken.safeTransferFrom(seller, buyer, propertyId, shares);
    payable(seller).transfer(payment);
}

---

## Response Timeline

We take all security reports seriously and aim to:

- **Acknowledge receipt:** Within 24 hours
- **Initial assessment:** Within 48 hours
- **Regular updates:** Every 3-5 days
- **Resolution timeline:** Depends on severity
  - Critical: 24-48 hours
  - High: 3-7 days
  - Medium: 1-2 weeks
  - Low: 2-4 weeks

### Our Process

1. **Triage:** Assess severity and impact
2. **Investigation:** Reproduce and analyze vulnerability
3. **Patch Development:** Create and test fix
4. **Security Review:** Internal audit of fix
5. **Deployment:** Deploy patch to production
6. **Disclosure:** Coordinate public disclosure (if applicable)
7. **Recognition:** Credit reporter (with permission)

---

## Security Measures

### Infrastructure Security

#### Smart Contract Security

✅ **Multi-Signature Wallets**
- All critical operations require multiple signatures
- Prevents single point of failure
- Time-delayed execution for major changes

✅ **Access Control**
- Role-based permissions (OpenZeppelin AccessControl)
- Principle of least privilege
- Regular permission audits

✅ **Upgrade Mechanisms**
- Transparent proxy pattern for upgradability
- Time-locked upgrades with community notification
- Emergency pause functionality

✅ **Circuit Breakers**
- Emergency pause in case of security incidents
- Gradual unpause mechanisms
- Protected by multi-sig

#### Frontend/Backend Security

✅ **Authentication & Authorization**
- Secure wallet connection (WalletConnect, MetaMask)
- JWT token-based API authentication
- Rate limiting on all endpoints

✅ **Data Protection**
- HTTPS/TLS encryption for all communications
- Input validation and sanitization
- SQL injection prevention
- XSS protection (Content Security Policy)

✅ **API Security**
- API key rotation
- Request signing
- Rate limiting and throttling
- DDoS protection

#### Infrastructure

✅ **Monitoring & Alerts**
- 24/7 system monitoring
- Anomaly detection
- Real-time security alerts
- Automated incident response

✅ **Backup & Recovery**
- Regular automated backups
- Disaster recovery plan
- Geographic redundancy

---

## Smart Contract Security

### Security Audits

**Audit Schedule:**
- Pre-launch: Full security audit by reputable firm
- Quarterly: Ongoing security reviews
- Before major updates: Comprehensive audit

**Past Audits:**
- Q1 2025: Initial audit (scheduled)
- Audit reports published at: `docs/audits/`

### Security Practices

```solidity
// ✅ Good Security Practices

// 1. Reentrancy Protection
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";

contract SecureMarketplace is ReentrancyGuard {
    function purchaseShares() external nonReentrant {
        // Protected against reentrancy
    }
}

// 2. Access Control
import "@openzeppelin/contracts/access/AccessControl.sol";

contract SecureProperty is AccessControl {
    bytes32 public constant ADMIN_ROLE = keccak256("ADMIN_ROLE");
    
    function sensitiveOperation() external onlyRole(ADMIN_ROLE) {
        // Only admins can execute
    }
}

// 3. SafeMath (Solidity 0.8+ built-in)
function calculate(uint256 a, uint256 b) external pure returns (uint256) {
    return a + b; // Automatic overflow protection
}

// 4. Checks-Effects-Interactions Pattern
function withdraw() external {
    uint256 amount = balances[msg.sender]; // Check
    balances[msg.sender] = 0;              // Effect
    payable(msg.sender).transfer(amount);  // Interaction
}

// 5. Input Validation
function setPrice(uint256 price) external {
    require(price > 0, "Price must be positive");
    require(price <= MAX_PRICE, "Price exceeds maximum");
    propertyPrice = price;
}

We will launch a bug bounty program to reward security researchers who help us keep MAK Platform secure.

Planned Rewards (Tentative):

Scope:

• Smart contracts on mainnet
• Frontend application
• Backend APIs
• Infrastructure components

Out of Scope:

• Testnet deployments
• Third-party dependencies (report to vendors)
• Social engineering attacks
• Physical attacks

Security researchers who report valid vulnerabilities will be:

• Credited in our security hall of fame (with permission)
• Acknowledged in security advisories
• Invited to test new features early

✅ Protect Your Private Keys

• Never share your private keys or seed phrases
• Use hardware wallets for large holdings
• Enable all available security features (2FA, biometrics)

✅ Verify Transactions

• Always review transaction details before signing
• Check recipient addresses carefully
• Verify contract addresses match official ones

✅ Stay Informed

• Follow official MAK Platform channels
• Be aware of phishing attempts
• Verify URLs (official: makplatform.com)

❌ Red Flags - Potential Scams

• Unsolicited messages requesting private keys
• "Too good to be true" investment promises
• Urgent requests to take action immediately
• Unofficial websites or apps

// ✅ Secure Coding Examples

// 1. Input Validation
function validatePropertyId(id: number): boolean {
  if (!Number.isInteger(id) || id < 0) {
    throw new Error('Invalid property ID');
  }
  return true;
}

// 2. Error Handling
async function fetchProperty(id: number) {
  try {
    validatePropertyId(id);
    const property = await contract.getProperty(id);
    return property;
  } catch (error) {
    logger.error('Failed to fetch property', { id, error });
    throw new Error('Property fetch failed');
  }
}

// 3. Safe External Calls
async function callExternalContract(address: string) {
  if (!ethers.utils.isAddress(address)) {
    throw new Error('Invalid address');
  }
  // Proceed with call
}

// 4. Rate Limiting
const rateLimiter = new RateLimit({
  windowMs: 15 * 60 * 1000, // 15 minutes
  max: 100 // limit each IP to 100 requests per window
});

# ✅ Secure .env practices

# Never commit sensitive data
# Use different keys for dev/staging/prod
# Rotate keys regularly

# .env.example (safe to commit)
NEXT_PUBLIC_NETWORK=sepolia
NEXT_PUBLIC_CHAIN_ID=11155111

# .env (never commit - in .gitignore)
PRIVATE_KEY=your_actual_private_key_here
INFURA_API_KEY=your_actual_api_key_here

Our Response Plan:

1. Detection → Automated monitoring alerts team
2. Assessment → Evaluate severity and impact
3. Containment → Pause affected systems if necessary
4. Investigation → Analyze root cause
5. Remediation → Deploy fixes
6. Recovery → Restore normal operations
7. Communication → Notify affected users
8. Post-Mortem → Document lessons learned

Security Incidents: andrewk529@protonmail.com
Response Time: < 1 hour for critical issues

In case of a security incident affecting users:

• Email notification to all affected users
• Public announcement on official channels
• Detailed post-mortem report (after resolution)
• Compensation plan (if applicable)

We maintain compliance with:

✅ Securities Regulations

• SEC compliance (US)
• FCA compliance (UK)
• Local jurisdiction requirements

✅ Data Protection

• GDPR (European Union)
• CCPA (California)
• Privacy by design principles

✅ AML/KYC

• Know Your Customer verification
• Anti-Money Laundering procedures
• Sanctions screening

✅ Smart Contract Standards

• ERC-1155 token standard
• OpenZeppelin security guidelines
• Ethereum best practices

• Quarterly security audits
• Annual penetration testing
• Continuous compliance monitoring
• Third-party security assessments

• Development Security Guidelines
• Smart Contract Audit Reports
• Incident Response Playbook

• OpenZeppelin Security
• Ethereum Security Best Practices
• OWASP Top 10
• CWE/SANS Top 25

Email: andrewk529@protonmail.com
PGP Key: [Available on request]

Response Times:

• Critical: < 1 hour
• High: < 4 hours
• Medium: < 24 hours
• Low: < 48 hours

Follow our security advisories:

• GitHub Security Advisories
• Official blog (coming soon)
• Twitter @makplatform (coming soon)

• v1.0 (October 2025) - Initial security policy
• Updates published with each major release

Last Updated: October 13, 2025
Next Review: January 2026

Thank you for helping keep MAK Platform secure! 🛡️