How I approach vulnerability research and bug hunting, recon, common bug classes, and disclosure flow.

A rundown of the labs, CTF practice sites, and blue team training platforms I actively use, with what each is good for.

This is the Custom Cyclical Cipher! Enclose the flag in our wrapper for submission. If the flag was "example" you would submit "picoCTF{example}".

We found a brand new type of encryption, can you break the secret code (Wrap with picoCTF{}) fegdeogdgecoeocgcgchcfcffccfca

I found the flag, but my brother wrote a program to encrypt all his text files. He has a spelling quiz study guide too, but I don't know if that helps.

I have these 2 images, can you make a flag out of them?

A new modular challenge! Take each number mod 41 and find the modular inverse for the result. Then map to the following character set: 1-26 are the alphabet, 27-36 are the decimal digits, and 37 is an underscore. Wrap your decrypted message in the picoCTF flag format (i.e. picoCTF{decrypted_message})

Our data got corrupted on the way here. Luckily, nothing got replaced, but every block of 3 got scrambled around! The first word seems to be three letters long, maybe you can use that to recover the rest of the message.