Secure XML: The New Syntax for Signatures and Encryption

18.1. Message Digests

You use message digest algorithms in the following contexts:

• DigestMethod, to digest referenced data in a Reference element.

• SignatureMethod, as part of the signature or message authentication code algorithm, although in the cases listed here, the message digest algorithm is indicated by part of the SignatureMethod algorithm URI.

• EncryptionMethod, as part of the encryption algorithm. In the cases given in this chapter, it appears as an explicit parameter in the form of a DigestMethod element.

• AgreementMethod, as part of the key agreement algorithm. In the cases given in this chapter, it appears as an explicit parameter in the form of a DigestMethod element.

See Chapter 2 for a discussion of message digests. See also Figure ...