ECES Certified Encryption Specialist

Mono-Alphabet Cipher CORRECT ANSWERS: -this type of cipher substitutes one character of ciphertext for one character of plaintext Ceasar Cipher CORRECT ANSWERS: -each letter is shifted a fixed number of spaces to the left or right in the alphabet -the shifting is the "key" -the shift is often called the "alphabet" being used' Atbash CORRECT ANSWERS: -hebrew code which substitutes the first letter of the alphabet for the last and the second letter for the second to last, etc. ...

What term below best describes an attack in which the attacker obtains ciphertext corresponding to a set of plaintexts to use in an attempt to derive the key used? CORRECT ANSWERS: Chosen plaintext Which attack is like a chosen-plaintext attack, except the attacker can obtain ciphertexts encrypted under two different keys? CORRECT ANSWERS: Related-key Attack What is a known plaintext attack and uses a linear approximation to describe the behavior of the block cipher and was invented by M...