chpt_17 Security CAIE Computer Science Quiz

Explain the working principle of symmetric encryption.

• Symmetric encryption uses a different key for encryption and decryption.

• Symmetric encryption does not require any key for encryption and decryption.

• Symmetric encryption uses the same key for both encryption and decryption.

• Symmetric encryption uses a public key for encryption and a private key for decryption.

What is symmetric encryption?

• A type of encryption that can only be used for text-based data

• A type of encryption where different keys are used for encryption and decryption

• A type of encryption where the same key is used for both encryption and decryption

• A type of encryption that doesn't require a key

What is asymmetric encryption?

• A type of encryption that is extremely easy to break

• A type of encryption using only one key to encrypt and decrypt data

• A type of encryption that is no longer used in modern technology

• A type of encryption using a pair of keys (public and private) to encrypt and decrypt data

How does asymmetric encryption differ from symmetric encryption?

• Asymmetric encryption is faster than symmetric encryption.

• Asymmetric encryption uses the same key for both encryption and decryption.

• Asymmetric encryption uses a pair of public and private keys.

• Asymmetric encryption does not require any keys.

What is the purpose of Transport Layer Security (TLS) in network security?

• To make network communication less secure

• To provide secure communication over a computer network.

• To provide faster internet speed

• to enable VPN to work

What is a digital certificate and how is it used in the context of security?

• It is a form of encryption used to hide sensitive information

• It is a type of physical key used to unlock digital files

• It is a secure software program that protects against computer hacking

• It is a digital document that verifies the identity of a website or individual and is used to establish secure connections and authenticate identities.

How does PKI ensure secure communication?

• By using digital certificates to authenticate and encrypt data

• By using plain text to transmit data

• By sharing private keys openly

• By using weak encryption algorithms

What is quantum cryptography?

• A type of ancient encryption using hieroglyphics

• A method of communication using Morse code

• A form of cryptography based on astrology

• A method of secure communication using quantum mechanics

Discuss the potential impact of quantum cryptography on traditional encryption methods.

• Quantum cryptography can render traditional encryption methods obsolete.

• Quantum cryptography has no impact on traditional encryption methods

• Quantum cryptography is not a viable alternative to traditional encryption methods

• Traditional encryption methods are more secure than quantum cryptography

Describe the process of obtaining a digital certificate and its role in ensuring secure communication.

• The process involves generating a public and private key pair, submitting a CSR to a certificate authority, and receiving the digital certificate after verification. Its role is to provide authentication, encryption, and data integrity for secure communication.

• The process involves creating a public and private key pair, and its role is to block unauthorized access to the network.

• The process involves creating a public key, submiting a CSR, and its role is to block unauthorized access to the network.

• The process requires obtaining a certificate from the an authority, and its role is to provide proof of identity for online transactions.