Cryptography and Security Quiz

What is the primary difference between symmetric and asymmetric encryption?

• Symmetric uses two keys; asymmetric uses one key

• Symmetric uses one key for encryption and decryption; asymmetric uses a public and private key pair

• Symmetric is slower than asymmetric

• Asymmetric encryption cannot be used for secure communications

Which of the following is a common symmetric encryption algorithm?

• RSA

• AES

• ECC

• Diffie-Hellman

What does asymmetric encryption solve that symmetric encryption struggles with?

• The need for faster encryption

• Secure distribution of encryption keys

• Data integrity

• Larger data volume encryption

In asymmetric encryption, what is the purpose of the public key?

• To decrypt data

• To sign messages

• To encrypt data and verify digital signatures

• To be kept secret

What role does hashing serve in cryptography?

• It encrypts the message

• It provides a fixed-size digest that represents the original data, ensuring data integrity

• It generates encryption keys

• It decrypts data

Which hashing algorithm is considered obsolete due to vulnerabilities?

• SHA-256

• MD5

• SHA-3

• SHA-1

How is a digital signature created?

• Encrypting the entire message with the sender's public key

• Applying a hash function to the message and encrypting the hash with the sender's private key

• Encrypting the hash with a symmetric key

• Generating a random number for each message

What does a digital signature guarantee?

• Confidentiality only

• Data origin authenticity, integrity, and non-repudiation

• Fast data transmission

• Public key reliability

What is the Public Key Infrastructure (PKI)?

• A symmetric encryption algorithm

• Framework to manage public keys and digital certificates that establish trust

• A type of VPN

• A hashing algorithm

What is a Certificate Authority (CA) responsible for?

• Encrypting all internet traffic

• Issuing and managing digital certificates that verify the ownership of public keys

• Storing private keys securely for users

• Generating symmetric encryption keys