WGU - D334 Exam Graded A+
Question : Encryption/Decryption
CORRECT ANSWER : changing plaintext into ciphertext /
changing it backshould be applied to information you want to protect at rest as well as in transit
Question : Aescrypt
CORRECT ANSWER : Encrypt individual files
Question : Bitlocker and FileVault
CORRECT ANSWER : encrypt full disks
Question : Mono-alphabetic code or substitution
CORRECT ANSWER : Single mapping from alphabet to
cipher alphabet
Question : polyalphabetic code
CORRECT ANSWER : Mapping of alphabet to multiple
cipher alphabets
Question : One-time pad
CORRECT ANSWER : Unbreakable encryption. only uses
its cipher code once
Question : Pseudo-random number generators (PRNGs)
CORRECT ANSWER : This method repeats the random
numbers after a given time (periodic). They are fast and are also deterministic and are useful in producing a repeatable set of random numbers.
Question : True Random number generators (TRNGs)
CORRECT ANSWER : This method generates a true
random number and uses some form of random process. One approach is to monitor the movements of a mouse pointer on a screen or from the pauses between keystrokes. Overall, the method is generally slow, especially if it involves human interaction, but is non-deterministic and aperiodic.
Question : Frequency analysis
CORRECT ANSWER : Cipher cracking methodology that
involves identifying patterns and variations in the probability of codes.
Question : Entropy
CORRECT ANSWER : measures level of unpredictability
Question : Hardware Security Module (HSM)
CORRECT ANSWER : a tamper-evident and intrusion-
resistant physical device that safeguards and manages cryptographic keys and provides cryptographic processing
Question : Trusted platform module (TPM)
CORRECT ANSWER : A dedicated processor that handles
hardware-level encryption; allows you to encrypt data on your device
Question : Pigpen
CORRECT ANSWER : mono-alphabetic substitution cipher
that makes use of mapping plaintext characters to graphical characters rather than to alphabetic ones.
Question : Rail code
CORRECT ANSWER : Employs a method to scramble text
by writing it in a sequence across a number of rails.
Question : BIFID
CORRECT ANSWER : Makes use of a grid and which maps
the letters into numeric values.
Question : Playfair
CORRECT ANSWER : 5 × 5 matrix containing the alphabet
less the letter J. Cipher/decipher process consists of a set of rules outlining use of column and row combinations.