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Eccouncil 212-81 Exam

Exam Name: Certified Encryption Specialist
Exam Code: 212-81 ECES
Related Certification(s): Eccouncil Certified Encryption Specialist Certification
Certification Provider: Eccouncil
Actual Exam Duration: 120 Minutes
Number of 212-81 practice questions in our database: 206 (updated: Jun. 11, 2024)
Expected 212-81 Exam Topics, as suggested by Eccouncil :
  • Topic 1: Information Theory Cryptography Concepts/ Multi-Alphabet Substitution
  • Topic 2: Introduction and History of Cryptography/ Breaking the Vigen?re Cipher
  • Topic 3: Symmetric Cryptography & Hashes/ Single Substitution Weaknesses
  • Topic 4: Symmetric Block Cipher Algorithms/ Basic Facts of the Feistel Function
  • Topic 5: International Data Encryption Algorithm (IDEA)/ History of Cryptography
  • Topic 6: Number Theory and Asymmetric Cryptography/ Advanced Encryption Standard (AES)
  • Topic 7: Propagating Cipher-Block Chaining (PCBC)/ Naor-Reingold and Mersenne Twister Pseudorandom Function
  • Topic 8: Server-based Certificate Validation Protocol/ Classification of Random Number Generator
  • Topic 9: Shiva Password Authentication Protocol (S-PAP)/ Challenge-Handshake Authentication Protocol (CHAP)
  • Topic 10: Point-to-Point Tunneling Protocol (PPTP)/ National Security Agency and Cryptography
  • Topic 11: Cracking Modern Cryptography: Ciphertext-only and Related-key Attack/ Cracking Modern Cryptography: Chosen Plaintext Attack
  • Topic 12: Steganography Implementations/ Example of Symmetric Stream Ciphers: RC4
  • Topic 13: Birthday Paradox: Probability/ Mono-Alphabet Substitution
  • Topic 14: Cracking Modern Cryptography/ Example of Symmetric Stream Ciphers: PIKE
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Free Eccouncil 212-81 Exam Actual Questions

Note: Premium Questions for 212-81 were last updated On Jun. 11, 2024 (see below)

Question #1

How many qubits are needed to break RSA?

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Correct Answer: C

Question #2

In order to understand RS

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Correct Answer: B

Question #3

Why is quantum computing a threat to RSA?

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Correct Answer: D

Question #4

Which of the following is assured by the use of a hash?

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Correct Answer: D


An important application of secure hashes is verification of message integrity. Comparing message digests (hash digests over the message) calculated before, and after, transmission can determine whether any changes have been made to the message or file.

Question #5

You are studying classic ciphers. You have been examining the difference between single substitution and multi-substitution. Which one of the following is an example of a multi-alphabet cipher?

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Correct Answer: D


The Vigenre cipher is a method of encrypting alphabetic text by using a series of interwoven Caesar ciphers, based on the letters of a keyword. It employs a form of polyalphabetic substitution.

First described by Giovan Battista Bellaso in 1553, the cipher is easy to understand and implement, but it resisted all attempts to break it until 1863, three centuries later. This earned it the description le chiffre indchiffrable (French for 'the indecipherable cipher'). Many people have tried to implement encryption schemes that are essentially Vigenre ciphers. In 1863, Friedrich Kasiski was the first to publish a general method of deciphering Vigenre ciphers.

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