Hasher is an encrypting algorithm and this website allows users to encrypt their text data using it. Since the hashed data has a format which makes it difficult to predict the encryption algorithm used, users can store their data without the fear of data theft. Users can decode their data using the same algorithm.
By Introducing "key" for each user, when the same data is encrypted using #hasher, it will give different output.
ie, Only the user could decrypt the encrypted data and the key should be stored by the user.