Authentication can be provided by adding_____to a message.
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Sign
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Manual Signature
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Digital Signature
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Initials
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None of these
C
Correct answer
Explanation
A Digital Signature is a cryptographic technique used to verify the authenticity and integrity of digital messages or documents. It provides authentication by ensuring the message comes from the claimed sender and hasn't been altered. Manual signatures and initials are physical, not digital, authentication methods.