CAS004: Set 3

In the context of Public Key Infrastructure (PKI), what is the primary purpose of a Certificate Authority (CA)?

• A) Encrypting data using public keys

• B) Decrypting data using private keys

• C) Validating the identity of entities and issuing digital certificates

• D) Generating session keys for secure communication

Which of the following best describes the purpose of transport encryption in a network environment?

• A) Protecting data at rest on storage devices

• B) Securing data during transmission between client and server

• C) Authenticating users during login processes

• D) Encrypting data stored in volatile memory

You have been asked by a member of senior management to explain the importance of encryption and define what symmetric encryption offers. Which of the following offers the best explanation?

• A. Non-repudiation

• B. Confidentiality

• C. Hashing

• D. Privacy and authentication

What cryptographic protocol is commonly used for implementing transport encryption in web communications?

• A) SSH (Secure Shell)

• B) TLS (Transport Layer Security)

• C) IPsec (Internet Protocol Security)

• D) SSL (Secure Sockets Layer)

Which of the following accurately describes a fundamental difference between block ciphers and stream ciphers in terms of their processing methodology?

• A) Block ciphers process messages in variable-length blocks.

• B) Stream ciphers process messages in fixed-length blocks.

• C) Block ciphers process messages in bits.

• D) Stream ciphers process messages in variable-length blocks.

As the security administrator for your organization, you must be aware of all types of hashing algorithms. Which algorithm was developed by Ron Rivest and offers a 128-bit output?

• A. AES

• B. DES

• C. MD5

• D. RC4

Which component of a Public Key Infrastructure (PKI) is responsible for securely distributing and managing digital certificates?

• A) Registration Authority (RA)

• B) Certificate Revocation List (CRL)

• C) Certificate Policy (CP)

• D) Certificate Repository

When considering a cryptographic solution for securing highly sensitive financial transactions over a public network, which cryptographic solution would be most appropriate?

• A) Symmetric encryption

• B) Asymmetric encryption

• C) One-time pad encryption

• D) Homomorphic encryption

In a scenario where secure communication between two parties is required, and there is a need for a shared secret key, which cryptographic solution would be the most appropriate choice?

• A) Quantum encryption

• B) Elliptic curve cryptography

• C) Homomorphic encryption

• D) Symmetric encryption

Which cryptographic technique involves dividing the message into fixed-size blocks for processing?

• A) Block ciphering

• B) Stream ciphering

• C) Hybrid encryption

• D) Asymmetric encryption