PicoCTF Easy1 Writeup — Recover an XOR Key with Crib Dragging

The flag is XOR-encrypted with a short repeating key. Since we know every picoCTF flag starts with picoCTF{, we XOR that known text ("crib") with the beginning of the ciphertext to recover the first bytes of the key, then complete the key by finding the repeating pattern. Platform: picoGym Category: Cryptography Points: 200 pts Difficulty:...