Answer:

Introduction:

A digital signature is a cryptographic technique used to validate the authenticity and integrity of a digital message or document. It is the digital equivalent of a handwritten signature or stamped seal, but it offers far more inherent security.

Body:

Authentication of Digital Signature

• Authentication of a digital signature means verifying the identity of the individual or entity that has signed the document.
• It ensures that the digital signature is attached to the correct individual and verifies that the document was not altered after signing.

Salient Built-In Features of a Digital Signature

• Authentication: Digital signatures authenticate the identity of the sender, providing assurance that the document originated from the stated sender.
• Non-Repudiation: The digital signature ensures that the signer cannot deny having signed the document, providing a form of non-repudiation.
• Integrity: A digital signature verifies that the content of the document or message has not been altered during transit.
• Timestamping: Digital signatures can incorporate timestamps to indicate precisely when the document was signed, providing a reliable timeline.
• Encryption: The process of digital signature involves encryption using a private key, enhancing the security of the document and signature.

Conclusion:

Digital signatures play a crucial role in maintaining the integrity, authenticity, and non-repudiation of digital messages or documents. As our world becomes increasingly digital, the importance of digital signatures and understanding their salient features becomes more essential.