Digital Signature Schemes

A digital signature scheme is equivalent in every way to a handwritten signature

• True

• False

A digital signature scheme is equivalent in every way to a basic electronic signature

• True

• False

A digital signature scheme offers a stronger notion of security than a message authentication code (MAC)

• True

• False

We should always use a digital signature scheme over a message authentication code (MAC) in every application since the former provides a stronger notion of security than the latter

• True

• False

If Alice wants to digitally sign a document using a digital signature scheme, then she needs to use her public key

• True

• False

In general, anyone can verify the authenticity of a digital signature for a particular document

• True

• False

What are the properties of a digital signature scheme?

• easy for signer to sign data

• easy for anyone to forge a digital signature

• easy for anyone to verify a message

• hard for anyone to forge a digital signature

If Alice wants to sign a message and then submit the digital signature to Bob, then Alice needs to sign the message using

• Alice's public key

• Bob's public key

• Alice's private key

• Bob's private key

If Alice wants to encrypt a message using a public key cryptosystem and then submit the ciphertext to Bob, then Alice needs to encrypt the message using

• Alice's public key

• Bob's public key

• Alice's private key

• Bob's private key

A digital signature scheme with appendix requires the signed message to be appended with the signature

• True

• False