Rezolvări pentru Olimpiada de Securitate Cibernetica OSC 2025 etapa județeană Notă: Acest writeup conține soluțiile pentru provocările din etapa județeană a OSC 2025. Flag-urile prezentate sunt...

Write-ups for Romanian CyberSecurity Challenge 2025 Online Qualifiers. 7th place in the competition and 4th place on Junior category. List of challenges solved: Write-ups for Romanian CyberSe...

DotMatrix: Building a Modern QR Code Solution Introduction DotMatrix is a full-stack web application for QR code generation and decoding, developed as a university project for the “Arhitectura Si...

chess-tui | A chess TUI implementation in rust 🦀 Open-source project I participated in a hackathon RustWorkshop, organized by Politehnica University of Bucharest and I contributed to the open-sou...

Descarcă rezolvările problemelor din Gazeta Matematică GMB 9/2024 În curând voi implementa un viewer pentru fișierul PDF, chiar aici pe site.

Quadratic Leak - m0lecon CTF 2025 Teaser Flag : ptm{Nonlinear_Algebra_Preserved_Over_Large_Integers} Difficulty: Medium We got the Python source code used to encrypt the flag: from Crypto.Pu...

qrime - AlpacaHack Round 3 (Crypto) Flag : Alpaca{q_and_r_have_nothing_to_do_with_QR_code} Difficulty: Easy/Medium We got the Python source code used to encrypt the flag: import os from Cryp...

Spooky RSA - HackTheBox Flag : HTB{cu570m_83475_73x7800k_3v32y_71m3} Difficulty: Easy We got the Python source code used to encrypt the flag: from Crypto.Util.number import bytes_to_long, ge...

LostModulus - HackTheBox Flag : HTB{n3v3r_us3_sm4ll_3xp0n3n7s_f0r_rs4} Difficulty: Very Easy The challenge provides a RSA script and the ciphertext. The script is using a small e value which ...

Old School - ROCSC && CyberEDU Flag : ROSCSC{LCRO-ECSC-8989-1918} Difficulty: Medium Firstly, check out the description because, this challenge it’s so tricky : formatul ROSCSC{cod_li...