Crypto Challenges

Basic Encoding Soup

Every hacker needs to recognize common encoding schemes. This challenge layers three of the most common encodings...

The ROT Side

ROT13 is childs play. But what about its more obscure cousin that handles the full printable ASCII range? Ciphertext:

Escaped Reality

Web applications love to encode special characters. Sometimes the encoding gets applied in unexpected orders....

Double Trouble

Sometimes attackers apply the same encoding multiple times to evade detection. Simple but effective. Ciphertext:

Compressed Thoughts

Malware authors love compression. The magic bytes 1f 8b are your friend. Ciphertext:

Inflate the Truth

Zlib is gzips cousin - commonly used in HTTP compression and many file formats. Ciphertext:

High Base

Base64 is mainstream. Base85 offers higher density encoding. Ciphertext:

Escape Mania

Some WAFs can be bypassed by encoding payloads multiple times. Ciphertext:

Loader Chain

Inspired by real IoT botnet droppers (Mirai, Gafgyt). Ciphertext: