Cryptography: AES, RSA, SHA, ECC, Data Privacy Compliance: GDPR, HIPAA, NIST, ISO 27001, Cybersecurity Frameworks: NIST, CIS Controls, MITRE ATT&CK, Security Operations: SIEM, Incident Response, Threat Intelligence, Ethical Hacking: Penetration Testing, Vulnerability Assessment, Network Protocols: TCP/IP, DNS, DHCP, VPN, BGP, OSPF, Firewall & IDS/IPS: Fortinet, Palo Alto, Snort, Suricata, Cloud Security: AWS Security, Azure Security, Zero Trust Model, Operating Systems: Linux (Ubuntu, CentOS, Kali), Windows Server, Programming: Python, Bash Scripting, Security Tools: Wireshark, Metasploit, Burp Suite, Nmap, Nessus, phpAdmin, CryptTool 2.0