$ whoami
0xg64r
Abdelkader Jedidi
Cybersecurity Enthusiast
CTF player, challenge creator, and cybersecurity enthusiast focused on offensive security.
terminal
About
I'm Abdelkader Jedidi (aka 0xg64r)
A cybersecurity enthusiast. I actively participate in CTF competitions and also create challenges for various events. I'm currently a student at The Higher Institute of Computer Science.
Focus
Web Security
SQL InjectionXSSCSRFSSRFIDORFile InclusionOWASP Top 10
Binary Exploitation
Buffer OverflowFormat StringHeap ExploitationROPShellcode
Stack
PythonBashJavaScriptC/C++SQLx86-64 Assembly
Experience
EducationSep 2023 — Jun 2024
Tunisian Baccalaureate in Computer Science
With High Honors
EducationSep 2024 — Present
Bachelor's in Network and Computer Systems Engineering
Higher Institute of Computer Science, Ariana
WorkSep 2025 — Present
Technical Lead and Instructor
Securinets ISI Ariana
- >Authored diverse, challenging CTFs and led their organization and execution
- >Delivered hands-on workshops on secure coding and web exploitation
WorkJul 2024 — Jun 2025
Network & Security Intern
Délice Danone
- >Collaborated with network managers to develop skills
- >Applied cybersecurity knowledge to detect potential vulnerabilities
CTF Achievements
1st
Hack The System
1st
Mojo Jojo CTF
2nd
KyubiSec CTF
7th
Quals Securinets INSAT
North Africa
3rd
Cat The Flag
ENIT
3rd
Gotham edition CTF
ISGT
10th
Patriot CTF
International
Writeups
$search writeups --category all
PWNEasy2026
Pwn — HRBot
#bufferoverflow#ret2win
PWNMedium2026
Pwn — Brunner Stocks
#bufferoverflow#ret2shellcode
PWNMedium2026
Pwn — Locked Out
#format-string#buffer-overflow#canary-leak#ret2win
PWNHard2026
Pwn — Pure Notes
#heap#use-after-free#tcache-poisoning#haskell
PWNHard2026
Pwn — Guessing Game
#oob#stack-pivot#side-channel#one-gadget