Options:

type(+Type)

SHA algorithm used to compute the digest. Values are sha1, sha224, sha256, sha384 or sha512. The default is the same as for rsa_sign/4. This option must match the algorithm that was used for signing. When operating with different parties, the used algorithm must be communicated over an authenticated channel.

encoding(+Encoding)

Encoding to use for Data. Default is hex. Alternatives are octet, utf8 and text.