When you use a URL shortener, you are effectively encrypting the URL and telling someone they have to go to some 3rd party to get the plaintext. Without any che

When you use a URL shortener, you are effectively encrypting the URL and telling someone they have to go to some 3rd party to get the plaintext. Without any checksum to verify that the 3rd party didn't send an incorrect URL, either maliciously or by accident.