There's a secret passcode hidden in the robot's "history of cryptography" module. But it's encrypted! Here it is, hex-encoded: encrypted.txt[1]. Can you find the hidden passcode?

hint:Like the title suggests, this is repeating-key XOR. You should try to find the length of the key - it's probably around 10 bytes long, maybe a little less or a little more.

[1]https://picoctf.com/api/autogen/serve/encrypted.txt?static=false&pid=82a42d1d859d5c2140e8942848e5db0e