challenges

Hex Advent CTF 欢迎参加 HEX ADVENT 2025，又到了释放你潜力的时节！🎁 HEX ADVENT 2025 是一个以圣诞节为主题的 CTF 降临节日历，由女性设计，专为女性打造。 12 天，12 项挑战：以结构化的安排，助你在不同 CTF 类别中掌握技能。 重点领域 - Pwn（二进制利用） - 密码学 - 逆向工程 - 取证 - OSINT - Web 漏洞利用 我们的使命 赋能网络安全领域的女性，树立可见的榜样，并培养一支强大的本地人才队伍。 挑战 1. Christmas Wishlist 🎄 Web 2. Merry Osintmas OSINT 3...

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...