WGU C839 (WGUC839)

WGU C839: Intro to Cryptography Module 1. Questions and answers, VERIFIED. 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 - -Mono-Alphabet Substitution First used by Julius Caesar Every letter is shifted a fixed number of spaces to the left or right the alphabet. - -Caesar Cipher Hebrew Code substitutes the first letter of the alphabet f...

WGU C839: Intro to Cryptography Module 5: Questions and answers, 100% Accurate. VERIFIED. Finding any method to decrypt the message that is more efficient that simple brute force attempts. - -Breaking Ciphers Simply trying every possible key to decrypt a message - -Brute Force Using other techniques to attempt to derive the key, can be used to test the efficacy of a cryptographic algorithm. Frequently used to test hash algorithms for collisions. - -Cryptanalysis The most basic to...

WGU C839: Intro to Cryptography Module 3. Questions and answers, VERIFIED WGU C839: Intro to Cryptography Module 3. Questions and answers, VERIFIED. 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 decrypt - -Asymmetric Cryptography Slo...

Intro to Cryptography WGU C839 Module 2. Questions and answers, 100% Accurate, VERIFIED. 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. - -Symmetric Cryptography Modern cryptography began when Claude Shannon publish "Communication Theory of Secrecy Systems" in 1949. He focused on this concept by quantifying information, leading to a number of methods for encrypting and decrypting inf...

WGU - C839, Top Questions and answers, 100% Accurate, VERIFIED. What produces the same ciphertext from identical plaintext? - -Electronic Codebook (ECB) Vulnerability of DES - -Key length is too short ________ includes a provision for the decryption key in escrow. - -Skipijack __________ combines hashing, data compression, symmetric key, and PKI functions. - -PGP Kerchoffs Principle - -Keys must be absolutely secured. Hashing functions make birthday attacks possible because________...

WGU C839 - Pre-Assessment: Introduction to Cryptography, Questions and answers, VERIFIED. Which encryption standard uses the same key to encrypt and decrypt messages? - -Symmetric Key Encryption Which algorithm is designated as a Type 2 product by the National Security Agency (NSA)? - SKIPJACK What is the most commonly used format for certificates? - -X.509 v3 *Version 3* What is referenced to determine if a certificate has been revoked? - -Certificate Revocation List *(CRL)* ...

WGU - C839 Pre-assessment - Introduction to Cryptography. Questions and answers, Verified. Rated A+ 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 key of the company - -Private key of the root CA 2. A business wants to use keys issue...

WGU C839, Questions and answers, 100% Accurate, VERIFIED. Symmetric - -Which encryption standard uses the same key to encrypt and decrypt messages? Skipjack - -Which algorithm is designated as a Type 2 product by the National Security Agency (NSA)? X.509 v3 - -What is the most commonly used format for certificates? Certificate revocation list (CRL) - -What is referenced to determine if a certificate has been revoked? Sender's public key - -What needs to be installed on end users' c...

Western Governors University Information C839/ C839 Cryptography Questions With Answers What type of encryption uses different keys to encrypt and decrypt the message? A Symmetric B Private key C Secure D Asymmetric D The most widely used asymmetric encryption algorithm is what? A RSA BVigenere C DES D Caesar Cipher A Original, unencrypted information is referred to as . A text B plaintext C cleantext D ciphertext B