Chapter 9

Which goal of cryptography ensures that the encoded data remains unaltered during transmission?

• Confidentiality

• Ensuring data integrity

• Authentication

• Non-repudiation

What is cipher text?

• The output of the encryption algorithm

• The message that is readable or understandable

• The key used for encryption

• The input for the decryption algorithm

What is the purpose of using a key in encryption algorithms?

• To ensure data integrity

• To share information with others

• To alter data

• To generate cipher text

What are the key lengths used in AES?

• 32 bits, 64 bits, 128 bits

• 128 bits, 192 bits, 256 bits

• 256 bits, 512 bits, 1024 bits

• 64 bits, 128 bits, 256 bits

Which encryption method is commonly used in secure messaging apps like WhatsApp?

• Symmetric encryption

• Asymmetric encryption

• Key exchange

• Hash function

What is the primary purpose of the DSA algorithm?

• Creating a public and private key

• Secure information exchange online

• Verifying electronic signatures

• Creating a shared secret key

What does PKI stand for in the context of secure communications and transactions?

• Protected Key Integration

• Private Key Infrastructure

• Public Key Infrastructure

• Personal Key Identification

Which type of PKI certificate is used to secure downloadable software?

• SSL/TLS certificates

• Code signing certificates

• Identity certificates

• Encryption certificates

Which algorithms isn’t commonly used for generating a digital signature from message and produces a 128-bit hash value?

• MD2

• MD4

• MD5

• SHA-256