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Introduction to Cryptography - C839 - ECES EC-Council Certified Encryption Specialist Practice Exam questions with complete solutions

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1. How did the ATBASH cipher work? CORRECT ANSWERS: 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? CORRECT ANSWERS: 2^56 3. Which of the following are valid key sizes for AES (choose three)...

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EC Council Encryption Specialist (ECES) /WGU C839| 98 questions| with complete solutions

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PKCS #1 CORRECT ANSWERS: RSA Cryptography Standard PKCS #3 CORRECT ANSWERS: Diffie-Hellman Key Agreement Standard PKCS #5/RFC 2898 CORRECT ANSWERS: Password-based Encryption Standard PKCS #8 CORRECT ANSWERS: Private-Key Information Syntax Standard PKCS #13 CORRECT ANSWERS: Elliptic ...

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Introduction to Cryptography - C839 - ECES EC-Council Certified Encryption Specialist Practice Exam pg3

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What advantage do symmetric algorithms have over asymmetric algorithms CORRECT ANSWERS: Symmetric algorithms are faster than Asymmetric algorithms Which of the following is generally true about key sizes? CORRECT ANSWERS: Larger key sizes increase security A ____ is a function is not reversi...

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C839 WGU STUDY QUIZ| 61 QUESTIONS| WITH COMPLETE SOLUTIONS

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Which encryption standard is approved by the National Security Agency (NSA) for classified information? CORRECT ANSWERS: Advanced Encryption Standard (AES Which National Security Agency (NSA) encryption algorithms are unevaluated commercial cryptographic components? CORRECT ANSWERS: Type 4 W...

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C839 - Intro To Cryptography - Study Prep| 655 QUESTIONS| 107 QUESTIONS| WITH COMPLETE SOLUTIONS

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Which encryption standard uses the same key to encrypt and decrypt messages? A) Asymmetric Key Encryption B) Symmetric Key Encryption C) Public Certificate D) CRL CORRECT ANSWERS: B Which algorithm is designated as a Type 2 product by the National Security Agency (NSA)? A) DES B) AES ...

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c839 pa STUDY GUIDE| 60 QUESTIONS| WITH COMPLETE SOLUTIONS

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Which encryption standard uses the same key to encrypt and decrypt messages CORRECT ANSWERS: Symmetric Which algorithm is designated as a Type 2 produce by the National Security Agency (NSA)? CORRECT ANSWERS: SkipJack Wha is the most commonly used format for certificates? CORRECT ANSWERS: x...

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Introduction to Cryptography - C839 Unit 1: Introduction to Cryptography QUESTIONS WITH COMPLETE SOLUTIONS

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Cryptography CORRECT ANSWERS: derived form the word kryptos which means "hidden," and the verb grafo, which means "Write", is the study of message secrecy Mono-Alphabet Substitution Algorithms CORRECT ANSWERS: These types of algorithms simply substitute one character of cipher text for each...

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C839 - Pre-Assessment| 60 QUESTIONS| WITH COMPLETE SOLUTIONS

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Which encryption standard uses the same key to encrypt and decrypt messages? A) Asymmetric Key Encryption B) Symmetric Key Encryption C) Public Certificate D) CRL CORRECT ANSWERS: Symmetric Key Encryption Which algorithm is designated as a Type 2 product by the National Security Agency (NS...

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Introduction to Cryptography - C839 blocks and key size Cipher I

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Twofish CORRECT ANSWERS: 128 bits and key sizes of 128, 192, or 256 bits. It is a Feistel cipher. IDEA CORRECT ANSWERS: Operates on 64 bit blocks and has a 128 bit key. Consists of 8 identical transformations each round and an output transformation. CAST-128 CORRECT ANSWERS: Operates on 64 ...

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WGU - C839 Things to Memorize| Multiple Choice - Use Write format and start with Term| 163 QUESTIONS| WITH COMPLETE SOLUTIONS

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AES is ___ a. Asymmetric b. Symmetric CORRECT ANSWERS: B Serpent is ___ a. Asymmetric b. Symmetric CORRECT ANSWERS: B Two Fish is ___ a. Asymmetric b. Symmetric CORRECT ANSWERS: B RC5 & RC6 is ___ a. Asymmetric b. Symmetric CORRECT ANSWERS: B IDEA is ___ a. Asymmetric b. Sy...

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Intro to Cryptography WGU C839 Module 3 QUESTIONS WITH COMPLETE SOLUTIONS

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Consists of public and private keys The public key is made public by publishing to a directory or installed on a computer. The private key is kept secret Does not involve exchanging a secret key or key exchange The public key is used to encrypt messages only the recipients private key can decryp...

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Study for WGU final WGU - C839| 50 QUESTIONS| WITH COMPLETE SOLUTIONS

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DES (block/key/rounds) CORRECT ANSWERS: BLOCK SIZE - 64bit KEY SIZE - 56bit ROUNDS - 16 AES (block/key/rounds) CORRECT ANSWERS: BLOCK SIZE - 128bit KEY SIZE - 128, 192, or 256 ROUNDS - 10,12, or 14 Blowfish (block/key/rounds) CORRECT ANSWERS: BLOCK SIZE - 64bit KEY SIZE - 32-448 bit R...

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C839-Practice test| 92 QUESTIONS| WITH COMPLETE SOLUTIONS

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What term from the list below best describes a data concealment for covert communication that makes use of LSB replacement? -Crypanalysis -Stegnalysis -Steganography -Whitening CORRECT ANSWERS: Steganography Which block cipher below uses a block size of 128 bits and key sizes up to 256 bit...

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Intro to Cryptography WGU C839 Module 2| 62 QUESTIONS| WITH COMPLETE SOLUTIONS

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The same key is used to encrypt messages as well as decrypt messages. These algorithms are always faster but have an issue with exchanging keys. CORRECT ANSWERS: Symmetric Cryptography Modern cryptography began when Claude Shannon publish "Communication Theory of Secrecy Systems" in 1949. He f...

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Intro to Cryptography WGU C839 Module 1 QUESTIONS WITH COMPLETE SOLUTIONS

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Most primitive of cryptographic algorithms, substitutes one character of cipher text for each character of plain text. Includes Caesar Cipher Atbash Cipher Affine Cipher Rot13 Cipher CORRECT ANSWERS: Mono-Alphabet Substitution First used by Julius Caesar Every letter is shifted a fixed num...

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Cryptography C839 Set 1 QUESTIONS AND ANSWERS 100% CORRECT

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Which block cipher modes can be used to turn a block cipher into a stream cipher? Select two. CORRECT ANSWERS: Counter Mode CTR and Output Feedback Mode OFB What are reasons certificates should have an expiration date? Select all that apply CORRECT ANSWERS: 1 Decreases risk of compromise 2 T...

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WGU Course C839 - Intro to Cryptography | 295 QUESTIONS| WITH COMPLETE SOLUTIONS

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What type of encryption uses different keys to encrypt and decrypt the message? A Symmetric B Private key C Secure D Asymmetric CORRECT ANSWERS: D The most widely used asymmetric encryption algorithm is what? A RSA B Vigenere C DES D Caesar Cipher CORRECT ANSWERS: A Original, une...

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Introduction to Cryptography - C839| 191 QUESTIONS| WITH COMPLETE SOLUTIONS

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Cryptography CORRECT ANSWERS: science of altering communication so that it cannot be understood without having the key Mono-Alphabet Substitution CORRECT ANSWERS: algorithms simply substitute one character of cipher text for each character of plain text. Caesar Cipher CORRECT ANSWERS: choos...

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WGU Introduction to Cryptography - C839 (EC-Council CES) 156 QUESTIONS WITH COMPLETE SOLUTIONS

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CrypTool CORRECT ANSWERS: Software which allows encryption of text using historic algorithms The Enigma Machine CORRECT ANSWERS: In World War II the Germans made use of an electro-mechanical rotor based cipher Known as The Enigma Machine. Allied cipher machines used in WWII included the Brit...

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C839 - Pre-Assessment: Introduction to Cryptography| 60 QUESTIONS| WITH COMPLETE SOLUTIONS

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Which encryption standard uses the same key to encrypt and decrypt messages? CORRECT ANSWERS: Symmetric Key Encryption Which algorithm is designated as a Type 2 product by the National Security Agency (NSA)? CORRECT ANSWERS: SKIPJACK What is the most commonly used format for certificates? C...

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C839 Introduction to Cryptography| 247 QUESTIONS| WITH COMPLETE SOLUTIONS

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Cryptography CORRECT ANSWERS: The science of altering communication so that it cannot be understood without having the key. cipher CORRECT ANSWERS: The algorithm(s) needed to encrypt and decrypt a message. Mono-alphabet substitution CORRECT ANSWERS: Substitute one character of cipher text f...

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C839 Introduction to Cryptography| WGU C839| 130 QUESTIONS| WITH COMPLETE SOLUTIONS

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Symmetric CORRECT ANSWERS: Which encryption standard uses the same key to encrypt and decrypt messages? Skipjack CORRECT ANSWERS: Which algorithm is designated as a Type 2 product by the National Security Agency (NSA)? X.509 v3 CORRECT ANSWERS: What is the most commonly used format for cert...

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Introduction to Cryptography - C839 ( 206 QUESTIONS) WITH COMPLETE SOLUTIONS

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Cryptography (or cryptology); CORRECT ANSWERS: derived from word kryptós which means "hidden," and the verb gráfo, which means "write." It is the study of message secrecy. The process or skill of communicating in or deciphering secret writings or ciphers Cesar Cipher CORRECT ANSWERS: (m...

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Introduction to Cryptography - C839... ECES v2| 359 QUESTIONS| WITH COMPLETE SOLUTIONS

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Cryptography CORRECT ANSWERS: The process or skill of communicating in or deciphering secret writings What is a key component of any secure communications. CORRECT ANSWERS: Cryptography A way to encode a message that would be readable by intended recipients. CORRECT ANSWERS: Cryptography ...

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Pre-assesment - Introduction to Cryptography - C839 – WGU QUESTIONS WITH COMPLETE SOLUTIONS

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1. A business wants to use keys issued by a trusted third party to demonstrate to potential customers that it is a legitimate organization. Which key is used to sign the certificate issued to the business? Private key of the root CA Public key of the root CA Private key of the company Public...

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Introduction to Cryptography - C839- 172 QUESTIONS_ WITH COMPLETE SOLUTIONS

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- Cipher - Key - Algorithm CORRECT ANSWERS: - The algorithm(s) needed to encrypt and decrypt a message. - The random bits used in encrypting a message. - The mathematical process used to alter a message and read it unintelligible by any but the intended party Stream Cipher CORRECT ANSWERS:...

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Intro to Cryptography WGU C839 Module 4| 70 QUESTIONS| WITH COMPLETE SOLUTIONS

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These are usually the encryption of a message digest with the senders private key. In order to verify them, the recipient uses the senders public key. They are considered good if they provide the following. Authentication Integrity Non-repudiation CORRECT ANSWERS: Digital Signature It i...

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WGU C839 Flash Cards for OA| 77 QUESTIONS| WITH COMPLETE SOLUTONS

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DES CORRECT ANSWERS: 64 Bit Block - 56 Bit Key - 16 Rounds AES CORRECT ANSWERS: 128 Bit Block - 128, 192, 256 Bit Key - 10, 12, 14 Rounds BlowFish CORRECT ANSWERS: 64 Bit Block - 32 thru 448 Bit Key - 16 Rounds TwoFish CORRECT ANSWERS: 128 Bit Block - 1 thru 256 Bit Key - 16 Rounds S...

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C839 - Introduction to Cryptography| 190 QUESTIONS| WITH COMPLETE SOLUTIONS

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Serpent CORRECT ANSWERS: Symmetric Block Cipher Block Size: 128 bits Key Size: 128, 192, or 256 bits Rounds: 32 Network: Substitution-Permutation Tiny Encryption Algorithm (TEA) CORRECT ANSWERS: Symmetric Block Cipher Block Size: 64 bits Key Size: 128 bits Cryptography CORRECT ANSWER...

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