/ALGORITHM=option
       /ALGORITHM=XOR (default)

    Selects the algorithm used for file checksums. The default is the
    XOR algorithm for data within records, as used by the previous
    Checksum utilities on OpenVMS Alpha systems. Options include:

    o  CRC - A CRC-32 algorithm for all bytes within the file
       (possible record structures are ignored); this algorithm is
       also known as AUTODIN II, Ethernet, or FDDI CRC.

    o  MD5 - The MD5 digest, as published by Ronald L. Rivest
       (RFC 1321), for all bytes within the file (possible record
       structures are ignored).

    o  XOR - An XOR algorithm for all data, according to the record
       structure of the file.