SHA256

The SHA256 hash implements the HashFunction protocol for the specific case of SHA-2 hashing with a 256-bit digest (SHA256Digest). Larger digests take more space but are more secure.

You can compute the digest by calling the static hash(data:) method once. Alternatively, if the data that you want to hash is too large to fit in memory, you can compute the digest iteratively by creating a new hash instance, calling the update(data:) method repeatedly with blocks of data, and then calling the finalize method to get the result.