Certified Encryption Specialist Questions and Answers 100% Pass

Certified Encryption Specialist Questions and Answers 100% Pass Cryptography The science of altering communication so that it cannot be understood without having a key. Caesar Cipher Simple cipher that uses shifting letters. Atbash Used by Hebrews, cipher that reverses the alphabet. ROT13 Cipher that rotate or shifts by 13 letters. Scytale Cylinder tool used to encrypt and decrypt plaintext using a cloth or piece of leather wrapped around a rod. Vigenere Cipher Most common multi-alphabetic cipher. Symmetric Encryption Same key is used to Encrypt and Decrypt plaintext. Also known as Single Key Encryption. Diffusion Changes to one letter in plaintext changes multiple characters of the ciphertext. Confusion Makes the relationship between the statistical frequencies of the ciphertext and the actual key as complex as possible. Avalanche A small change in the input yields a large change in the output. Complete Avalanche A change in one bit of the plaintext affecting all bits in the ciphertext. Kerckhoffs Principle The crypto system should be secure if everything about the system, except the key, is publicly kn