Question 1
Julius Caesar reportedly used a cipher in which each plaintext letter is replaced by the letter three positions later in the alphabet. What type of cipher is this?
Correct Answer:
Monoalphabetic substitution (shift) cipher
Question 2
Which classical cipher uses a repeating keyword to select among multiple shifted alphabets, defeating simple single-letter frequency analysis?
Correct Answer:
Vigenere
Question 3
Kasiski examination is used to attack which classical cipher by identifying repeated ciphertext segments to estimate the key length?
Correct Answer:
Vigenere
Question 4
Which classical cipher rearranges plaintext letters by writing them in a zig-zag pattern across multiple rows and reading them off row by row?
Correct Answer:
Rail Fence cipher
Question 5
The Enigma machine used by Germany in World War II encrypted text by passing it through a series of rotating wheels. What was the primary cryptographic role of the rotors?
Correct Answer:
They implemented a polyalphabetic substitution that changed with every keypress
Question 1
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Prepare with the EC-Council Certified Encryption Specialist Practice Questions - EC-Council Certified Encryption Specialist (ECES, 212-81) Exam practice quiz. This question bank includes 100 questions covering cipher, classical, uses, plaintext, and mode. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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EC-Council Certified Encryption Specialist Practice Questions - EC-Council Certified Encryption Specialist (ECES, 212-81) Exam

This practice set contains 100 questions from the matching question bank and focuses on cipher, classical, uses, plaintext, and mode. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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