Cryptography - C839 - ECES EC
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Introduction to Cryptography - C839 - 
ECES EC-Council Certified Encryption 
Specialist Practice Exam Already Passed 
1. How did the ATBASH cipher work? By substituting each letter for the letter from the 
opposite end of the alphabet (i.e. Abecomes Z, B becomes Y, etc.) 
2. DES has a key space of what? 2^56 
3. Which of the following are valid key sizes for AES (choose three)? c. 128 
d. 192 
e. 256 
4. Which of the following algorithms uses three different keys to encrypt the plain text? 
3DES...
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Cryptography - C839 - ECES EC•Cryptography - C839 - ECES EC