Cryptography and Security Quiz

Which security function is provided by encryption algorithms?

• confidentiality

• key management

• authorization

• integrity

Which type of cryptographic key would be used when connecting to a secure website?

• symmetric keys

• digital signatures

• DES key

• hash keys

What do most cryptographic system attacks seek to target?

• user information

• the cryptographic algorithm

• key management

• the actual data packet

Which type of attack does the use of HMACs protect against?

• man-in-the-middle

• DoS

• DDoS

• brute force

What is a feature of asymmetrical encryption?

• Different keys are used to encrypt and decrypt data.

• It requires fewer computations than symmetric encryption requires.

• Key lengths are short.

• It encrypts bulk data quickly.

What is the reason for HMAC to use an additional secret key as input to the hash function?

• to provide integrity verification

• to provide encryption

• to provide authentication

• to prevent DoS attacks

What is the purpose of the DH algorithm?

• to support email data confidentiality

• to encrypt data traffic after a VPN is established

• to generate a shared secret between two hosts that have not communicated before

• to provide nonrepudiation support

Which statement describes the Software-Optimized Encryption Algorithm (SEAL)?

• SEAL is a stream cipher.

• It is an example of an asymmetric algorithm.

• It uses a 112-bit encryption key.

• It requires more CPU resources than software-based AES does.

Which data security component is provided by hashing algorithms?

• authentication

• integrity

• confidentiality

• key exchange

Which two algorithms use a hashing function to ensure message integrity? (Choose two.)

• 3DES

• MD5

• AES

• SEAL

• SHA