What is tamper-evident technology?

A layer of security in electronically notarized documents that provides evidence of any changes made to an electronic document after it was notarized. Notaries public may use one or more tamper-evident technologies to perform notarial acts with respect to electronic records. For example, Public Key Infrastructure (PKI) technology can be used to create a numeric digest or “thumbprint” of an electronic document that can reveal any subsequent tampering or corruption of the document. (See Digital Closings Clear Final Hurdles)