Checksum - A value that allows the contents of a file to be authenticated. This class allows the results of a variety of checksum and cryptographic message digest algorithms to be represented. checksum value - A lower case hexadecimal encoded digest value produced using a specific algorithm. Value is generated automatically using given algorithm. uses algorithm - The algorithm used to produce the subject Checksum. Version 2.2 of [SPDX] defines individuals for the following algorithms: MD2, MD4, MD5, MD6, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512.