CS student · aspiring cybersecurity engineer · building with AI · Athens, Greece 🇬🇷
_{· ⭐ uploading projects regularly}

CS student from Athens focused on cybersecurity and building real tools with AI / large language models. I learn by shipping — everything below is live and built end to end.

• 🛡️ Learning offensive & defensive security through hands-on projects
• 🤖 Certified on Anthropic's Claude (6 certifications) — I build tooling that uses AI
• 🌱 Currently going deeper on Python, networking, and secure-by-design thinking
• 📫 Reach me at antonsig08@gmail.com

🛰️ log-sentinel — AI-powered SSH log-anomaly explainer Heuristics flag brute-force & intrusion patterns; Claude explains each threat in plain English with severity + actions. Python · AI · blue-team

🎣 phish-analyzer — AI-assisted phishing email detector Heuristics extract red flags; Claude returns a verdict (phishing/suspicious/legitimate) with reasoning. Python · AI · email-security

🔐 Credential Checker — live demo Privacy-preserving password strength & data-breach checker using the k-anonymity model. Python · hashing · pytest

🛰️ port-scanner — concurrent TCP port scanner Built from scratch on sockets, with banner grabbing and a Markdown report flagging risky services. Python · networking · red-team

🔓 hash-cracker — hash identifier + dictionary cracker Identifies MD5/SHA hashes and cracks weak ones — shows why unsalted hashes are unsafe. Python · cryptography · red-team

🛡️ header-check — HTTP security-headers analyzer Grades a site's defenses (CSP, HSTS, clickjacking, …) A–F with actionable fixes. Python · web-security · OWASP

🔎 file-integrity-monitor — Tripwire-style tamper detection SHA-256 baselines catch modified, added, or removed files — even size-preserving edits. Python · blue-team · detection

🔑 jwt-inspector — JWT security analyzer Flags alg:none & weak claims, and brute-forces weak HMAC secrets to forge tokens. Python · web-auth · appsec

🔐 totp-authenticator — from-scratch 2FA code generator Implements TOTP/HOTP (RFC 4226/6238), verified against the official RFC test vectors. Python · 2FA · cryptography

🚩 CTF Writeups — reasoning-first solutions to Capture The Flag challenges (crypto, web, forensics, pwn)

⚡ SafeVolts — live on its own domain

📉 PaperTrader Stock paper-trading app. Vercel · Supabase

⏳ FocusFlow — focus / Pomodoro timer

🧮 GPA Calculator — grade point average tool

🗂️ Class Schedule Organizer — timetable builder

🎬 CineRate — movie rating app

🛡️ Sharpening my security skills · 🤖 building AI-powered tools · 🚀 shipping projects in public

Learning in public — more projects coming. 🚀