Karthikeyan K

Cybersecurity enthusiast with practical experience in web application security, API security testing, vulnerability assessment, and network security fundamentals. Hands-on exposure in identifying authentication, access control, and business logic vulnerabilities through security testing and research activities. Strong understanding of OWASP Top 10, reconnaissance, networking concepts, Linux administration, and cybersecurity methodologies.

Completed 80+ TryHackMe labs and multiple PortSwigger Web Security Academy labs. Looking for opportunities across Cybersecurity, SOC, VAPT, Security Analyst, and Network Security roles.

Security Researcher - NASA Vulnerability Disclosure Program

• Identified authentication and access control vulnerabilities during security testing on live web applications.
• Performed reconnaissance, endpoint analysis, and manual security testing using OWASP methodologies.

OAuth Security Testing - Managed Bug Bounty Program

• Discovered OAuth open redirect vulnerability affecting authentication workflows in a production environment.
• Analyzed authorization mechanisms and identified security weaknesses in OAuth implementation.

Master of Computer Applications - Computer Applications - P.S.N.A College of Engineering and Technology (2024-01 - 2026-12)

Bachelor of Computer Science - Computer Science - Vidhyasagar College of Arts and Science (2020-01 - 2023-12)