🚨 Learning C/C++? Beware of this classic trap: unspecified argument evaluation order! Different compilers = different results See why a specific tiny piece of code can behave wildly differently here hackarcana.com/code-print

🟢 It’s not too late to join us! The Mastering Binary Files and Protocols workshop starts tomorrow (Apr 8) at 6pm CEST. If you sign up today, you’ll still get: ✅ A spot in all of the live sessions ✅ Full access to all recordings ✅ 10% off with code MBF-HBS-10 Register here: hackarcana.com/bin

👇7 benefits of joining Mastering Binary Files and Protocols 👇 ✔️ Real binary skills ✔️ Faster debugging ✔️ Security mindset ✔️ Independence ✔️ Career boost ✔️ Problem-solving ✔️ Data insight 🗓️ Starts April 8 🎥 Live sessions + downloadable recordings 💸 MBF-HBS-10 = 10% off until April 7 🔗 hackarcana.com/bin

Come tonight at 7PM CEST! If you're into: 🧠 reverse engineering 🛠 understanding how things work 🧩 solving CTF-style puzzles — you'll love this session with @gynvael.bsky.social ! 🔴 www.youtube.com/live/xVrxfEk...

🚨 Last hours to join our free webinar with a legend – Gynvael Coldwind! What’s inside? • Real file handling mistakes • Weird path behavior • Hacker’s perspective on files • Even a bit of forensics 👀 🧩 Perfect for devs, admins, hackers & the curious. ⏳ Time’s running out → hexarcana.ch/lp/files

What will you learn in this webinar? 🧩 What is a file—really? 🧠 Hidden file features & common dev mistakes 📁 Weird world of file paths (yes, it gets strange) 🔍 A glimpse into digital forensics 🗓 March 31 | ⏰ 8 PM CEST | 💸 Free Save your spot 👉 hexarcana.ch/lp/files/ and see you on Monday!

🚨 <script> isn’t just text—it’s a command! Want it to show up in HTML? You have to escape it: ✅ <script> → &lt;script&gt; Escaping keeps hackers out and your code clean 🔐 Learn why it matters & how it works in our latest article 👇 🔗 Read here: hackarcana.com/article/why-...

If you like CTF challenges, we've been steadily pushing some of my favorite tasks to my new edu site: hackarcana.com/exercises From top to bottom: Linux RE, 2x JS RE, USB PCAP, ZIP/crypto, DOS/VGA RE, 2x BMP image stegano, 5x BMP file format stegano, Python 2.7 RE, and ROP RE HFGL

Did you know pressing CTRL+D can make some C++ programs crash or loop forever? 🤯 That’s because cin enters an error state instead of truly “closing” input. Most apps handle it well—but not all 🙅 Want to see why? Read our recent article 👉 hackarcana.com/article/ctrl...

We've published a new article! ⌨️ Linux Terminal: CTRL+D is like pressing ENTER hackarcana.com/article/ctrl... Enjoy!

Pro tip for protocol hand-crafting lovers: Having problems sending \r\n on Linux? Press CTRL+V to escape the next key press, and follow it up with ENTER to get \r. CTRL+V, ENTER, ENTER → \r\n

⚠️ Sanitizing input is tricky! Removing unwanted HTML tags prevents XSS, but won’t stop SQL injections. To keep your app safe, use validation, escaping, and sanitization where they belong 🔐 🔗 Read more here: hackarcana.com/article/sani...

We've got 200% increase in players overnight! Well, yes, it's 2→4 on the scoreboard, but we're just starting :) And we have more challenges on the way, a lot more!

For your enjoyment we're slowly adding @gynvael.bsky.social old challenges to our archive: hackarcana.com/exercises Slowly... becuase we test each one and re-flag them. Some fun ones are yet to come! Enjoy! P.S. If you like scoreboards, here's a chance to grab top1 easily.

🚀 New blog post on hackArcana! Learn about: 🔹 Validation vs. escaping vs. filtering 🔹 When to use each method 🔹 Common input handling mistakes 🔗 Read here: hackarcana.com/article/sani...

Hey everyone! 👋 This is the official account of hackarcana.com — the educational portal from HexArcana Cybersecurity (hexarcana.ch). If you want to up your skills in hands-on cybersec, click follow!