Panopticon — Focus Timer
A Chrome extension for deep focus cycles: enforced site blocking, a persistent timer overlay, and session statistics.
JavaScriptChrome APIPrivacy
View project Cybersecurity & Software Engineering
Ahmet Semseddin Gultekin
I build and break software to make it safer.
Third-year Computer Engineering student at Sakarya University. I work on application and network security, write small security tools, and care about clean, dependable engineering.
What I focus on
01
Application security
Finding and fixing vulnerabilities in web applications: authentication, input handling, and secure design.
02
Network & systems
Traffic analysis, hardening, and understanding how systems behave under attack.
03
Tooling & cryptography
Small, focused tools in Python and C — hashing, encoding, and analysis utilities.
Selected work
All projects →Python Hash Cracker
A multi-process, dictionary-based hash cracking tool supporting several algorithms and salt configurations.
PythonMultiprocessingCryptography
View project Advanced Password Analyzer
Evaluates password entropy and cross-references credentials against the Have I Been Pwned API to detect known breaches.
PythonAPI IntegrationSecurity Analysis
View project