Vigenere Cipher Reflection

“From what you’ve seen what are the properties of the Vigenere Cipher that make it harder to crack? In other words, if you had to crack a vigenere cipher what would you do?“

It's harder to crack because it requires a key. Keys make it so you can't just switch around the letters to find out the original message. No part of the original message should exist in the vigenere cipher's encryption unless the key is weak.

To crack a vigenere cipher, I would need to try and figure out the secret key, probably through brute forcing many different keys until I found the right one.