013
- Description:
MXV{BNRNKWPCEUSEX}k:FLAG
🔎 Solution​
Given the provided ciphertext and key, this appears to be a Vigenère cipher, where each ciphertext letter is determined by (plaintext + shift_from_key) mod 26.
Using Vigenère cipher decoder with the key FLAG reveals the plaintext.
🚩Flag​
HMV{VIGNERECYPHER}