challenges

Hex Advent CTF HEX ADVENT 2025에 오신 것을 환영합니다. 당신의 잠재력을 펼칠 시즌입니다! 🎁 HEX ADVENT 2025는 크리스마스 테마의 CTF 어드벤트 캘린더로, 여성에 의해 여성을 위해 설계되었습니다. 12일, 12개의 챌린지: 다양한 CTF 카테고리에서 숙련도를 쌓을 수 있는 체계적인 일정입니다. 중점 분야 - Pwn Binary Exploitation - Cryptography - Reverse Engineering - Forensics - OSINT - Web Exploitation 우리의...

Code Security Advent Calendar 2021

We are happy to announce our sixth consecutive Code Security Advent Calendar! Born at RIPS in 2016, each calendar comprises 24 little code puzzles containing hidden security vulnerabilities that wait to be spotted. This is our way to share good vibes with the community while learning and having f...

Java Security Advent Calendar 2019

Open Advent Calendar 2019 24 Java Security Challenges Every day in December, until 24th, we will release a new Java code snippet that poses a critical security bug - similar to last years calendars. Each hidden bug can be in form of a classic vulnerability type, a faulty security patch that can b...

Wide-Ranging German Doxxing Incident Hits Hundreds of Politicians

Hundreds of German politicians, including Chancellor Angela Merkel, have been doxxed in a puzzling incident, with their private information and political documents dumped online. At least one local reporter is claiming the information is explosive. According to a report from German public...