Cryptography Quiz

What is the primary goal of cryptography?

• To ensure security of communication

• To create complex algorithms

• To monitor traffic flows

• To store data securely

What does confidentiality in secure communication refer to?

• Data integrity

• Privacy and secrecy

• Authentication

• Availability

Which type of attacker can eavesdrop on communication?

• Innocent bystander

• Active attacker

• Passive attacker

• Malicious attacker

What is a characteristic of symmetric encryption?

• Uses two different keys

• Uses the same key for encryption and decryption

• Is slower than asymmetric encryption

• Does not require a key

What is the key length for a typical symmetric encryption algorithm?

• 512 bits

• 256 bits

• 128 bits

• 16 bits

Which cipher is an example of a substitution cipher?

• Caesar Cipher

• Blowfish

• AES

• RSA

What does the term 'non-repudiation' mean in information security?

• Only the sender can read the message

• Data is always available

• An entity cannot deny its previous actions

• Data can be accessed by anyone

What is the purpose of a digital signature?

• To generate random keys

• To store passwords securely

• To provide proof of data integrity

• To encrypt data

Which algorithm is known for its use in public key cryptography?

• AES

• RSA

• DES

• Caesar Cipher

What is the main function of a message digest?

• To encrypt messages

• To generate keys

• To provide proof that data has not been altered

• To store passwords