Techniques for attesting to content

摘要

Techniques for attesting to content received from an author (sender) are provided. A sender's content is represented by a message digest. The message digest is signed by an identity service. The signed message digest represents an attestation as to the authenticity of the content from the sender. The sender transmits the signed message digest and content in a message to a recipient. The recipient verifies the signature and message digest to authenticate the content from the sender.