COMPUTER ETHICS AND SECURITY
CRYPTOGRAPHY AND ENCRYPTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Private key is unique to the sender so that recipients can be sure of the source of messages.
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Signature can be forged easily
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Sender cannot deny that he sent the message if he had signed with his private key.
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Any change in the message will invalidate the digital signature.
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Detailed explanation-1: -The digital signature confirms the integrity of the message. This signature ensures that the information originated from the signer and was not altered, which proves the identity of the organization that created the digital signature. Any change made to the signed data invalidates the whole signature.
Detailed explanation-2: -If a digital signature isn’t valid, there can be many causes. For example, the sender’s certificate may have expired, it may have been revoked by the certificate authority (CA), or the server that verifies the certificate might be unavailable. Notify the message sender of the problem.
Detailed explanation-3: -The correct answer is Redundancy.
Detailed explanation-4: -Digital signatures provide a way to verify the authenticity of an electronic document or message, ensuring that the message’s sender is whom they claim to be and that the message has not been tampered with in transit.
Detailed explanation-5: -Digital signatures work by proving that a digital message or document was not modified-intentionally or unintentionally-from the time it was signed. Digital signatures do this by generating a unique hash of the message or document and encrypting it using the sender’s private key.