___________ is the method to authenticate the sender of a message.
Digital signature is the method to authenticate the sender of a message.
Digital signatures are the public-key primitives of message authentication. In the physical world, it is common to use handwritten signatures on handwritten or typed messages. They are used to bind signatory to the message. Similarly, a digital signature is a technique that binds a person/entity to the digital data.
Certificates are widely accessible because they are used for either encryption or signature verification. Private-keys require some reasonable level of protection because they are used either for decryption or for digital signature.
A digital signature (not to be confused with a digital certificate) is a mathematical technique used to validate the authenticity and integrity of a message, software or digital document.
Learn the difference between a digital and electronic signature. ... An electronic signature is an electronic symbol attached to a contract or other record, used by a person with an intent to sign. In contrast, digital signatures guarantee that an electronic document is authentic.