Chapter 5+

Front 1

The Hashed Message Authentication Code (HMAC) __________.

Back 1

encrypts the key and the message

Front 2

What is the latest version of the Secure Hash Algorithm?

Back 2

SHA-3

Front 3

All of the following can be broken mathematically EXCEPT____________.

Back 3

OTP

Front 4

Elliptic Curve Diffie-Hellman (ECDH) is an example of ______________.

Back 4

in-band key exchange

Front 5

Which of the following key exchanges uses the same keys each time?

Back 5

Diffie-Hellman (DH)

Front 6

Public key systems that generate random public keys that are different for each session are called __________________.

Back 6

perfect forward secrecy

Front 7

What is data called that is to be encrypted by inputting it into a cryptographic algorithm?

Back 7

plaintext

Front 8

Which of these is NOT a basic security protection for information that cryptography can provide?

Back 8

risk loss

Front 9

The areas of a file in which steganography can hide data include all of the following EXCEPT_________.

Back 9

in the directory structure of the file system

Front 10

Proving that a user sent an email message is known as ______________.

Back 10

non-repudiation

Front 11

A(n) ______________ is not decrypted but is only used for comparison purposes.

Back 11

digest

Front 12

Which of these is NOT a characteristic of a secure has algorithm?

Back 12

Collisions should be rare

Front 13

Which protection is provided by hashing?

Back 13

integrity

Front 14

Which of these is the strongest symmetric cryptographic algorithm?

Back 14

Advanced Encryption Standard

Front 15

If Bob wants to send a secure message to Alice using an asymmetric cryptographic algorithm, which key does he use to encrypt the message?

Back 15

Alice's public key

Front 16

A digital signature can provide each of the following benefits EXCEPT _____________.

Back 16

verify the receiver

Front 17

Which asymmetric cryptographic algorithm is the most secure?

Back 17

RSA

Front 18

Which asymmetric encryption algorithm uses prime numbers?

Back 18

RSA

Front 19

The Trusted Platform Module (TPM) ____________.

Back 19

provides cryptographic services in hardware instead of software.

Front 20

Which of these has an onboard key generator and key storage facility, as well as accelerated symmetric and asymmetric encryption, and can back up sensitive material in encrypted form?

Back 20

Hardware Security Module (HSM)

Front 21

Advanced Encryption Standard (AES)

Back 21

A symmetric cipher that was approved by the NISTin late 2000 as a replacement for DES.

Front 22

Algorithm

Back 22

Procedures based on a mathematical formula used to encrypt and decrypt the data

Front 23

Asymmetric Cryptographic Algorithm

Back 23

Cryptography that uses two mathematically related keys

Front 24

block cipher

Back 24

A cipher that manipulates an entire block of plaintext at one time

Front 25

blowfish

Back 25

a block cipher that operates on 64-bit blocks and can have a key length from 32 to 448 bits

Front 26

ciphertext

Back 26

data that has been encrypted

Front 27

cleartext

Back 27

unencrypted data

Front 28

cryptography

Back 28

the science of transforming information into a secure for so that unauthorized persons cannot access it

Front 29

Data encryption standard

Back 29

A symmetric block cipher that uses a 65-bit key and encrypts data in 64-bit blocks

Front 30

decryption

Back 30

the process of changing cyphertext into plaintext

Front 31

Diffie-Hellman

Back 31

A key exchange that requires all parties to agree upon a large prime number and related integer so that the same key can be separately created

Front 32

Diffie-Hellman Ephemeral

Back 32

A diffie-hellman key exchange that uses different keys

Front 33

Digest

Back 33

The unique digital fingerprint created by a one-way hash algorithm

Front 34

Digital Signature

Back 34

An electronic verification of the sender

Front 35

Elliptic Curve Diffie-Hellman

Back 35

A diffie-hellman key exchange that uses elliptic curve cryptography instead of prime numbers in its computation

Front 36

Encryption

Back 36

The process of changing plaintext into ciphertext

Front 37

Ephemeral Key

Back 37

A temporar key that is used only once before it is discarded

Front 38

GNU Privacy Guard

Back 38

Free and open sourced software that is commonly used to encrypt and decrypt data

Front 39

Hardware Security Module (HSM)

Back 39

A secure cryptographic processor

Front 40

Hash

Back 40

An algorithm that creates a unique digital fingerprint

Front 41

Hated Message Authentication Code (HMAC)

Back 41

A hash function that is applied to both the key and the message

Front 42

in-band

Back 42

Exchanging secure information within normal communication channels

Front 43

Key

Back 43

A mathematical value entered into a cryptographic algorithm to produce encrypted data

Front 44

Key Exchange

Back 44

The process of sending and receiving secure cryptographic keys

Front 45

Message Digest (MD)

Back 45

A common hash algorithm with several different versions

Front 46

Message Digest 5 (MD5)

Back 46

the current version of MD

Front 47

Non-Repudiation

Back 47

The process of proving that a user performed an action

Front 48

One-Time pad (OTP)

Back 48

Combining plaintext with a random key to create cipher text that cannot be broken mathematically

Front 49

out-of-band

Back 49

Exchanging secure information outside the normal communication channels

Front 50

Perfect Forward Secrecy

Back 50

Public key systems that generate random public keys that are different for each section

Front 51

plaintext

Back 51

Cleartext data that is to be encrypted and decrypted by a cryptographic algorithm

Front 52

Pretty Good Privacy (PGP)

Back 52

A commercial product that is commonly used to encrypt files and messages

Front 53

Private Key

Back 53

A asymmetric encryption key that does have to be protected

Front 54

Private Key cryptography

Back 54

Cryptographic algorithms that use a single key to encrypt and decrypt a message

Front 55

Public Key

Back 55

An asymmetric encryption key that does not have to be protected

Front 56

Public Key Cryptography

Back 56

Cryptography that uses to mathematically related keys