Study Guide Ch 6 Flashcards Preview

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Flashcards in Study Guide Ch 6 Deck (17):
1

Plaintext (P)

Data that anyone can read

2

Ciphertext (C)

Encrypted message

3

Key

A number used to encrypt/decrypt

4

Key space

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

5

Bit size

The number of binary bits in the key

6

Cryptovariable

A cryptographic key

7

Cryptography

The art of creating and implementing secret codes and ciphers

8

Cryptanalysis

The study of methods to defeat codes and ciphers

9

Cryptology

The combined areas of cryptography and cryptanalysis

10

Cryptosystem

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

11

AND operation

Returns true only if both values is true

12

OR operation

Returns true if at least one of the values is true

13

NOT operation

Reverses the value of an input variable

14

Exclusive OR operation

Returns true when only one of the input values is true

15

The modulo function

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

16

one-way functions

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

17

Nonce

A random number used as a placeholder variable in mathematical functions