What is a hash? A hash is a fingerprint that helps us identify the content of a file in a simple sequence of characters.
Regardless of the size of a file its hash will always have a certain length, which allows you to publish a unique identifier, or, an alphanumeric sequence that represents the content of the file. This is a fingerprint that identifies all of the file’s content in a simple line of text without needing a lot of disk space or having to publish confidential information associated with the content of the file.
In other words, the hash is a sequence that can be determined from the content of a file but not vice versa. Meaning, it is impossible to obtain the content of a file from a hash. It does not compromise the data that the file contains.
Find out more information about what is a hash in this video: