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Exam (elaborations)
C839 - Pre-Assessment: Introduction to Cryptography
Which encryption standard uses the same key to encrypt and decrypt messages? - Answer- Symmetric Key Encryption 
 
Which algorithm is designated as a Type 2 product by the National Security Agency (NSA)? - Answer- SKIPJACK 
 
What is the most commonly used format for certificates? - Answer- X.509 v3 *Version 3* 
 
What is referenced to determine if a certificate has been revoked? - Answer- Certificate Revocation List *(CRL)* 
 
What needs to be installed on *end users' computers* to allow them ...
Exam (elaborations)
WGU Introduction to Cryptography - C839 (EC-Council CES)
CrypTool - Answer- Software which allows encryption of text using historic algorithms 
 
The Enigma Machine - Answer- In World War II the Germans made use of an electro-mechanical rotor based cipher Known as The Enigma Machine. 
 
Allied cipher machines used in WWII included the British TypeX and the American SIGABA. 
 
The ADFGVX Cipher - Answer- invented by Colonel Fritz Nebel in 1918. 
The key for this algorithm is a six-by-six square of letters, used to encode a 36-letter alphabet. 
 
The Pl...
Exam (elaborations)
WGU Course C839 - Intro to Cryptography Q&A 2022/2023
What type of encryption uses different keys to encrypt and decrypt the message? - Answer- Asymmetric 
 
The most widely used asymmetric encryption algorithm is what? - Answer- RSA 
 
Original, unencrypted information is referred to as ____. - Answer- plaintext 
 
Which of the following is not an asymmetric system? - Answer- DES 
 
In order for User A to send User B an encrypted message that only User B can read, User A must encrypt message with which of the following keys? - Answer- User B's pu...
Exam (elaborations)
WGU Course C839 - Intro to Cryptography Quizlet by Brian MacFarlane
What type of encryption uses different keys to encrypt and decrypt the message? 
 
A Symmetric 
B Private key 
C Secure 
D Asymmetric - Answer- D 
 
The most widely used asymmetric encryption algorithm is what? 
 
A RSA 
B Vigenere 
C DES 
D Caesar Cipher - Answer- A 
 
Original, unencrypted information is referred to as ____. 
 
A text 
B plaintext 
C cleantext 
D ciphertext - Answer- B 
 
Which of the following is NOT an asymmetric system? 
 
A PGP 
B RSA 
C SSL 
D DES - Answer- D 
 
In order ...