Digital Signatures Quiz

What is the primary purpose of a digital signature?

• Encrypting messages

• Verifying the authenticity and integrity of a message

• Compressing data

• Generating random numbers

Which type of cryptography is used in creating digital signatures?

• Symmetric key cryptography

• Asymmetric key cryptography

• Hash functions

• Steganography

In asymmetric cryptography, what are the two types of keys used?

• Encryption key and decryption key

• Public key and private key

• Symmetric key and asymmetric key

• Hash key and cipher key

Who has access to the private key in a digital signature system?

• Everyone

• Only the sender

• Only the receiver

• A trusted third party

What ensures that a digital signature cannot be forged?

• The complexity of the algorithm

• The secrecy of the private key

• The length of the message

• The use of hash functions

What is the role of a hash function in digital signatures?

• To encrypt the message

• To compress the message

• To create a unique fixed-size representation of the message

• To generate keys

Why is it computationally infeasible to find two different messages with the same hash value?

• Because of the length of the hash

• Due to the design of cryptographic hash functions

• Because of the use of private keys

• Due to the encryption process

What does the receiver use to verify a digital signature?

• The sender's private key

• The sender's public key

• Their own private key

• A shared secret key

If a message is altered after being signed, what will happen during the verification process?

• The signature will still be valid

• The hash values will not match, indicating tampering

• The receiver can correct the message

• The private key will decrypt the message

What is a potential risk if a private key is compromised?

• Messages can no longer be encrypted

• Anyone can forge the sender's digital signature

• The public key becomes invalid

• Hash functions become unreliable