Greetings,
Please proceed to the cbc-decrypt folder under week3; a challenge is waiting for us.
Your job is to find the key used for cbc encryption. We first provide encrypted_flag to you: that contains data and the data is encrypted by using cbc. We also provide a list of passwords that will be the candidate keys. Your job is to find which key leads to the decrypted plaintext data that starts with cs370. Once you're successful, you will have the flag.
Good luck