digital signature

Binary code that, like a handwritten signature, authenticates and executes a document and identifies the signatory. A digital signature is practically impossible to forge and cannot be sent by itself but only as a part of an electronic document or message. In the US, electronic confirmation of signatures is legally acceptable from October 1, 2000 under the 'Electronic Signatures In Global And National Commerce Act' (also called 'E-sign Act'). The act gives full legal weight to electronic technologies that ensure authentication, confidentiality, data integrity, and non-repudiation, and directs courts to consider the electronic records on the same legal footing as the paper records. Also called electronic seal or electronic signature.