CRYPTOHACK

Stream of Consciousness

Description

Talk to me and hear a sentence from my encrypted stream of consciousness.

Help

This page offers a convenient way for you to interact with the challenge functions. You can also use GET requests to send and receive data directly from the listed routes/endpoints if you wish. For more information see the FAQ.

Your aim is to recover the FLAG value. Once you have have it, submit it on the CryptoHack Symmetric Ciphers page.

Source

from Crypto.Cipher import AES
from Crypto.Util import Counter
import random


KEY = ?
TEXT = ['???', '???', ..., FLAG]


@chal.route('/stream_consciousness/encrypt/')
def encrypt():
    random_line = random.choice(TEXT)

    cipher = AES.new(KEY, AES.MODE_CTR, counter=Counter.new(128))
    encrypted = cipher.encrypt(random_line.encode())

    return {"ciphertext": encrypted.hex()}


Interact

encrypt()
Output

XOR tool

Use this form to XOR two hex strings together.

Output
Hex Encoder/Decoder

This is a convenient encoder designed for ASCII <-> Hex translations. It won't work for decoding hex to byte streams and will just show [unprintable] in that case.

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