4. Non-Repudiation Cryptography and Digital Signatures Quiz

Why is it important to verify the origin of data in cryptography?

• To make the data readable

• To compress the data

• To ensure the data is encrypted

• To confirm the data is from the intended sender

What is a hash in the context of cryptography?

• A method to compress data

• A way to decrypt data

• A short string of text based on the original data

• A type of encryption

What does a hash ensure about the data?

• It is encrypted

• It is from a specific sender

• It has not been altered

• It is compressed

What is the limitation of using a hash for data verification?

• It cannot encrypt the data

• It cannot verify the sender

• It cannot verify the data's integrity

• It cannot compress the data

What additional feature does a digital signature provide over a hash?

• Verification of the sender

• Data decryption

• Data encryption

• Data compression

What key is used to create a digital signature?

• Public key

• Symmetric key

• Private key

• Hash key

In the example of Alice and Bob, what does Alice do first to create a digital signature?

• Encrypt the message

• Send the message

• Decrypt the message

• Create a hash of the message

What does Bob use to verify the digital signature sent by Alice?

• Alice's private key

• Alice's public key

• A hash key

• A symmetric key

What does Bob compare to verify the integrity of the message?

• The encrypted message

• The original message

• The hash from the digital signature and the hash he creates

• The public key and the private key

What is the main benefit of understanding the digital signature process?

• To decrypt data

• To better understand data integrity and proof of origin

• To encrypt data

• To compress data