Study Guide Ch 6

Question 1

Plaintext (P)

Answer 1

Data that anyone can read

Question 2

Ciphertext (C)

Answer 2

Encrypted message

Question 3

Key

Answer 3

A number used to encrypt/decrypt

Question 4

Key space

Answer 4

The range of values that are valid for use as a key for a specific algorithm

Question 5

Bit size

Answer 5

The number of binary bits in the key

Question 6

Cryptovariable

Answer 6

A cryptographic key

Question 7

Cryptography

Answer 7

The art of creating and implementing secret codes and ciphers

Question 8

Cryptanalysis

Answer 8

The study of methods to defeat codes and ciphers

Question 9

Cryptology

Answer 9

The combined areas of cryptography and cryptanalysis

Question 10

Cryptosystem

Answer 10

A specific implementation of a code or cipher in hardware or software

Question 11

AND operation

Answer 11

Returns true only if both values is true

Question 12

OR operation

Answer 12

Returns true if at least one of the values is true

Question 13

NOT operation

Answer 13

Reverses the value of an input variable

Question 14

Exclusive OR operation

Answer 14

Returns true when only one of the input values is true

Question 15

The modulo function

Answer 15

the remainder value left over after a division operation is completed.

Question 16

one-way functions

Answer 16

A mathematical operation that easily produces output values but makes is impossible to retrieve the input values

Question 17

Nonce

Answer 17

A random number used as a placeholder variable in mathematical functions