PicoCTF2022 - Vigenere
Description
Can you decrypt this message? Decrypt this message using this key "CYLAB".
Information
Point Value: 100 points
Category: Cryptography
Hints
- https://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher
Solution
We know the text file is encoded using a vigenere cipher, so we open the txt file to obtain the encoded cipher, and use CyberChef to decode it. Entering the encoded cipher from the txt file as the input and using the "Vigenere Decode" recipe with a key of "CYLAB", we get the output "picoCTF{D0NT_US3_V1G3N3R3_C1PH3R_ae82272q}".