Digital Signatures Authentication using digital signatures is done using S/MIME authentication. It involves adding a digital signature to the outgoing message. Digital signatures are verifiable transformation made on a piece of data by the private key, which can be verified by using the corresponding public key. They bind a document to the possessor of a particular key. Digital signatures are used to bind information to the identity of its originator. They can be used to provide data origin authentication, data integrity, and non-repudiation. A digital signature includes the following parts: • A certificate authority’s distinguished name of the signer • A sender’s public key (optional) • The serial number of the signer’s certificate To enable non-repudiation, TIBCO BusinessConnect uses S/MIME to add a digital signature to each outbound public message, checks inbound public messages for a digital signature, and stores incoming messages in the non-repudiation database. Non-repudiation depends on authentication using digital signatures. To learn more about non-repudiation in TIBCO BusinessConnect, see Non-Repudiation.