Hashing

Hashing is a process used to convert data of any size into a fixed-length string of characters, usually through a mathematical algorithm. Unlike encryption, which can be reversed (decrypted), hashing is a one-way function, meaning that the original data cannot be recovered from the hash.

For example, when a file or password is hashed, any slight change in the input data will produce a completely different hash value. This makes it ideal for detecting changes in data and ensuring that files or messages haven't been altered.