MId term

Question 1

Define plain Text

Answer 1

Text that is readable and not encrypted

Question 2

Define Cipher Text

Answer 2

Text that has been encrypted

Question 3

Define Encryption

Answer 3

The act of encipherment

Question 4

Define Decryption

Answer 4

The act of decipherment

Question 5

What is a Transposition Cipher

Answer 5

A cipher that moves letters around but does not change the letters present

Question 6

What is a substation Cipher

Answer 6

A cipher that substitutes letters for other letters given a rule. Eg caesar cypher substitutes one letter for that letter plus an offset in the alphabet.

Question 7

What is a polyalphabetic Cipher

Answer 7

A cypher where each letter is substituted based on the letter of the key that lines up with it in the table.

Question 8

What method do you use to break a Caesar cipher

Answer 8

Frequency analysis and double letters.

Question 9

What method do you use to break a vigareta cipher

Answer 9

By finding the length of the key (N) and then using frequency analysis of every N’th character

Question 10

What encryption method is 100% secure

Answer 10

One time pads

Question 11

what is the length of a key in a one-time pad

Answer 11

The same length as the message that is encrypted.

Question 12

What are side channel attacks

Answer 12

Side channel attacks attack the implementation of the encryption algorithm rather than a flaw in the encryption algorithm its self

Question 13

What is the C in the CIA triad

Answer 13

Confidentiality

Question 14

What is the I in the CIA triad

Answer 14

Intergrity

Question 15

What is the A in the CIA triad

Answer 15

Accessibility

Question 16

What acronym represents the hexad

Answer 16

AUP

Question 17

What is the A in AUP hexad

Answer 17

Authenticity

Question 18

What is the U in AUP hexad

Answer 18

Usability

Question 19

What is the P in AUP hexad

Answer 19

Possesion

Question 20

What does integrity mean?

Answer 20

Keeping information from unauthorised changes

Question 21

What does accessibility mean?

Answer 21

Keeping information available for people to use

Question 22

What does confidentiality mean?

Answer 22

Keeping information from unauthorised access/viewing

Question 23

What does authenticity mean?

Answer 23

Knowing who or what sent a piece of information

Question 24

What does Utility mean?

Answer 24

The infomation must be in a useful state, it must not be encrypted.

Question 25

What does possession mean?

Answer 25

Control must not be lost of the information.

Question 26

What is an active threat

Answer 26

A threat that changes something in the system

Question 27

What is a passive threat

Answer 27

A threat that does not change anything in the system and observes

Question 28

What is an insider threat

Answer 28

Insider threats stem from people with permission already in the system and could involve elevation permissions or abusing current ones.

Question 29

What is an outsider threat

Answer 29

Outsider threats stem from outside the system and access to the system must be established first.

Question 30

what is a vulnerability

Answer 30

A weakness that could be exploited by a threat source.

Question 31

What is a thre

Answer 31

Is a event or circumstance where a vulnerability could be exploited.

Question 32

What is an attack

Answer 32

An attack is an intentional attempt to gain unauthorised access or unauthorised modifications to information.