Deck 21: Cryptography and Security

Question 1

____________________ is a technique to detect changes to information rather than encrypt and decrypt information.

Answer 1

Hashing

Question 2

The hash value is called a ____.

A)cipher
B)digest
C)ciphertext
D)plaintext

Answer 2

B

Question 3

In ____ encryption,the single key must be shared between the individuals wishing to protect their data.

A)asymmetric
B)public key
C)symmetric
D)shareable

Answer 3

C

Question 4

In ____ encryption,the private key is kept private,in the hands of a single individual.

A)asymmetric
B)symmetric
C)private key
D)shared secret

Question 5

The ____ determines the level of data protection provided by the encryption technique.

A)encryption strength
B)storage technique
C)system entropy
D)key length

Question 6

A(n)____________________ is a special word,phrase,or binary number that is used during encryption or decryption to manipulate the data.

Question 7

Even the best encryption algorithm can be outdone by improper use.

Question 8

In the ____ cipher technique,the letters of the alphabet are shifted one or more positions to obtain the encryption alphabet.

A)Caesar
B)Roman
C)Augustus
D)Romani

Question 9

A ____ is visible or invisible information added to an image,video,or audio that identifies the copyright owner of the media.

A)digital signature
B)digital footprint
C)digital fingerprint
D)digital watermark

Question 10

Keeping secrets has become a major force in networking and communication.

Question 11

____ ciphers encrypt any number of bits

A)Bit
B)Hash
C)Stream
D)Block

Question 12

____ is a fascinating and possibly dangerous technique for hiding one form of information inside another.

A)Sociology
B)Cryptography
C)Steganography
D)Social analytics

Question 13

A JPG image is a complex data structure containing compressed DCT coefficients for ____ blocks of pixels.

A)4x4
B)8x8
C)16x16
D)32x32

Question 14

Symmetric encryption algorithms use one key for both encryption and decryption.

Question 15

A(n)____________________ cipher is an algorithm that encrypts or decrypts blocks of data,such as 64-bit or 128-bit chunks of information at a time.

Question 16

Asymmetric encryption algorithms use ____________________ keys to perform the encryption and decryption.

Question 17

Hashed data can be unhashed and turned back into their original form.

Question 18

The power of a particular encryption technique is based on the ____.

A)key length
B)encryption strength
C)storage technique
D)system entropy

Question 19

The ____________________ of the WAV file determines how much data can be hidden inside it.

Question 20

Symmetric encryption is generally thought to be more secure than asymmetric encryption.

Question 21

MATCHING
Match each item with a statement below.
a.Encryption
d.Decryption
b.Symmetric encryption
e.Asymmetric encryption
c.Cryptography
A single key is used to encrypt and decrypt the data

Question 22

Discuss the encryption strength of symmetric and asymmetric encryption.

Question 23

Describe symmetric encryption.

Question 24

Describe asymmetric encryption.

Question 25

MATCHING
Match each item with a statement below.
a.Encryption
d.Decryption
b.Symmetric encryption
e.Asymmetric encryption
c.Cryptography
The process to change something easy to read into something that is difficult to read

Question 26

MATCHING
Match each item with a statement below.
a.Encryption
d.Decryption
b.Symmetric encryption
e.Asymmetric encryption
c.Cryptography
Involves taking encrypted information and putting it back into the original form

Question 27

MATCHING
Match each item with a statement below.
a.Encryption
d.Decryption
b.Symmetric encryption
e.Asymmetric encryption
c.Cryptography
Two keys are used to encrypt and decrypt the data

Question 28

How is data hidden inside a WAV?

Question 29

What is a frequency analysis?

Question 30

MATCHING
Match each item with a statement below.
a.Encryption
d.Decryption
b.Symmetric encryption
e.Asymmetric encryption
c.Cryptography
Involves taking data and coding it into a different,unreadable form