CIT 270 Chapter 4 quiz questions

Which of the following is NOT a method for strengthening a key?

• Randomness

• Cryptoperiod

• Length

• Variability

Which of the following block ciphers XORs each block of plaintext with the previous block of ciphertext before being encrypted?

• Electronic Code Book (ECB)

• Galois/Counter (GCM)

• Counter (CTR)

• Cipher Block Chaining (CBC)

What entity calls in crypto modules to perform cryptographic tasks?

• Certificate Authority (CA)

• OCSP Chain

• Intermediate CA

• Crypto service provider

Which of the following are symmetric keys to encrypt and decrypt information exchanged during the session and to verify its integrity?

• Encrypted signatures

• Session keys

• Digital certificates

• Digital digests

Which of these is considered the strongest cryptographic transport protocol?

• TLS v1.2

• TLS v1.0

• SSL v2.0

• SSL v3.0

What is the strongest technology that would assure Alice that Bob is the sender of a message?

• Digital signature

• Encrypted signature

• Digest

• Digital certificate

What does a digital certificate associate?

• A user's public key with his private key

• A user's identity with his public key

• The user's private key with the public key

• A private key with a digital signature

Digital certificates can be used for each of these EXCEPT what?

• To verify the authenticity of the Registration Authorizer

• To encrypt channels to provide secure communication between clients and servers

• To verify the identity of clients and servers on the Web

• To encrypt messages for secure email communications

What is an entity that issues digital certificates?

• Certificate signatory (CS)

• Digital signer (DS)

• Certificate Authority (CA)

• Signature Authority (SA)

What is a centralized directory of digital certificates?

• Digital Signature Permitted Authorization (DSPA)

• Digital Signature Approval List (DSAP)

• Certificate Repository (CR)

• Authorized Digital Signature (ADS)