ECES
Liberty University
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ECES Cryptography Practice questions with complete solutions
- Exam (elaborations) • 4 pages • 2023
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1. How did the ATBASH cipher work? 
 
a. By shifting each letter a certain number of spaces 
b. By Multi alphabet substitution 
c. By rotating text a given number of spaces 
d. By substituting each letter for the letter from the opposite end of the alphabet (i.e. A becomes Z, B becomes Y, etc.) CORRECT ANSWERS: D 
 
2. DES has a key space of what? 
a. 2^128 
b. 2^192 
c. 2^56 
d. 2^64 CORRECT ANSWERS: C 
 
3. Which of the following are valid key sizes for AES (choose three)? 
 
a. 56 
b. 64 
c...
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ECES-Practice Test Questions with complete solutions
- Exam (elaborations) • 4 pages • 2023
-
Available in package deal
-
- $9.49
- + learn more
What type of encryption uses different keys to encrypt and decrypt the message? CORRECT ANSWERS: Asymmetric 
 
The most widely used asymmetric encryption algorithim is what? CORRECT ANSWERS: RSA 
 
Original, unencrypted information is referred to as ____. CORRECT ANSWERS: Plaintext 
 
Which of the following is not an asymmetric system? CORRECT ANSWERS: 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 follo...
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