ECES Practice exam 2023 with 100% correct answers

How did the ATBASH cipher work? By substituting each letter for the letter from the opposite end of the alphabet (i.e. Abecomes Z, B becomes Y, etc.) DES has a key space of what? 2^56 Which of the following are valid key sizes for AES (choose three)? 128, 192, 256 Which of the following algorithms uses three different keys to encrypt the plain text? 3DES Which of the following is a block cipher? AES Which of the following is a type of encryption that has two different keys. One key can encrypt the message and the other key can only decrypt it? Asymmetric Which of the following is an asymmetric cipher? RSA A cipher is defined as what The algorithm(s) needed to encrypt and decrypt a message Which of the following is not an asymmetric system? AES John is going to use RSA to encrypt a message to Joan. What key should he use? Joan's public key What advantage do symmetric algorithms have over asymmetric algorithms They are faster