Of course there is. On a simple level, consider a parent trying to locate their missing child. Someone might break into their social media accounts to see if there are messages that might help determine their whereabouts.
Consider a website hosting inappropriate pictures of children. Breaking into the server hosting the files and removing them is 100% ethical.
I'm sure you can think of more examples.
I believer the answere is a formula hope this helped
As far as I remember, message-digest functions distill the information contained within a file (small or large) into a single fixed-length<span>number, typically between 128 and 256 bits in length. This function is designed to protect the integrity of a piece of data to define changes to any part of a message.</span>
