HTTPS Authentication
Biometric Authentication
2-way Authentication
SQL injection prevention
Data encryption
Jail login
Anti Denial of Services(DoS)
CSRF & SSRF protection

A robust cryptocurrency exchange clone script must include layered security features to protect users and funds. Start with strong authentication, including multi-factor authentication, optional biometrics, and enforced password policies. Implement role-based access control and comprehensive audit logs to track administrative activity. Secure communications with TLS, encrypt data at rest, and use secrets management for API keys and credentials. Separate cold and hot wallets, employ multi-signature approvals for withdrawals, and monitor transactions with real-time anomaly detection. Apply rate limiting, strict input validation, and protections against DDoS and injection attacks. Conduct regular security audits, run automated vulnerability scanners, and maintain a bug bounty program to surface issues. Integrate KYC and AML tools, and ensure secure backup, disaster recovery, and incident response procedures to complete the defensive posture. Keep documentation clear and updated.