WGU Course C839 - Intro to Cryptography | 293 Questions and Answers with complete solution 45 pages

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 B Vigenere C DES D Caesar Cipher - A Original, unencrypted information is referred to as ____. A text B plaintext C cleantext D ciphertext - B Which of the following is NOT an asymmetric system? A PGP B RSAC SSL D DES - D In order for User A to send User B an encrypted message that only User B can read, User A must encrypt message with which of the following keys? A User A's public key B User A's private key C User B's public key D User B's private key - C The greatest weakness with symmetric algorithms is _____. A They are less secure than asymmetric B The problem of key exchange C They are slower than asymmetric D The problem of generating keys - B Which of the following is generally true about block sizes? A Smaller block sizes increase security B Block sizes must be more than 256 bits to be secure C Block size is irrelevant to security D Larger block sizes increase security - D A _____ is a function that takes a variable-size input m and returns a fixed-size string. A Symmetric cipher B HashC Asymmetric cipher D Feistel - B