Security

Question 1

What is symmetric encryption

Answer 1

It is where the process of decryption is simply the opposite of the process used to encrypt the original data

Question 2

What is one advantage to symmetric encryption systems

Answer 2

They are quick and easy to set up

Question 3

What is one disadvantage of Symmetric encryption

Answer 3

They are easy for modern computers to crack, as it just requires a relatively small number of combinations to be tried until the correct one is found

Question 4

Explain Asymmetric encryption in terms of keys

Answer 4

There are two keys, one encryption key and one decryption key.

Question 5

What are the five steps to asymmetric encryption

Answer 5

1. Encryption algorithm generates private and pubic key pairs
2. The recipient and sender swap public keys
3. A combined key is created from the others public key and their private key
4. Sends combined key encrypts
5. Recipients combined key decrypts

Question 6

How do you compare two different cryptographic methods

Answer 6

You compare how hard it is to break the system

Question 7

Describe three of the defining points of a good cipher

Answer 7

Cypher works on all types of data
Algorithm should be simple
The Cypher should not be larger than the original data

Question 8

Name some human biometric data

Answer 8

Finger Prints, Iris, DNA

Question 9

How does finger print recognition work

Answer 9

Device takes a picture of the finger print and uses pattern recognition to turn it into code, this code is then compared to the stored fingerprint to see if they are a match

Question 10

Where is finger print recognition used

Answer 10

On personal devices as another method of signing in

Question 11

How does Facial recognition work

Answer 11

It uses computer generated filters to transform images into numerical expressions that can be compared to each other

Question 12

Where is Facial recognition used

Answer 12

In security checks, at airports in passport control and check in

Question 13

Virus

Answer 13

A software which will attempt to spread over the network by infecting emails, once in the system the virus will deliver the payload to the system

Question 14

Torjan

Answer 14

Hidden virus’s, only open and attack once they have been opened by the user

Question 15

Spyware

Answer 15

A piece of software delivered by trojans or virus’s. It tracks the key presses and software use

Question 16

Scare-ware

Answer 16

Scare-ware attempts to scare the user into buying fake or malicious software.

Question 17

Ransom-ware

Answer 17

Uses similar tactics to Scare-ware, but will delete, collect or encrypt files which will then be ransomed

Question 18

Botnets

Answer 18

These will create a back door into your computer allowing a hacker to use it without your permission