ECES

ECES Cryptography Practice questions with complete solutions Last document update:   ago

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...

ECES-Practice Test Questions with complete solutions Last document update:   ago

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...