AQA A-Level Computing 6.4 Internet Security

Question 1

Virus

Answer 1

A small program attatched to another program or data file. It replicates itself by attaching itself to other programs. It usually attacks the computer.

Question 2

Spam

Answer 2

Unsolicited junk e-mails.

Question 3

Worm

Answer 3

A small program that exploits a network security weakness (security hole) to replicate itself through computer networks. It may attack computers.

Question 4

Remote login

Answer 4

When someone connects to a computer via the internet.

Question 5

Trojan

Answer 5

A program that hides in or masquerades as desirable software, such as a utility or a game, but attacks the computers it infects.

Question 6

Phishing

Answer 6

When someone tries to get you to give them your personal information

Question 7

Pharming

Answer 7

When a phisher changes DNS server information so that customers are directed to another site.

Question 8

Encryption

Answer 8

Using an algorithm and a key to convert message data into a form that is not understandable without the key to decrypt the text.

Question 9

Plain text

Answer 9

Message data before it is encrypted

Question 10

Cipher text

Answer 10

message data after it has been encrypted

Question 11

Decryption

Answer 11

Using an algorithm and a key to convert encypted message data into its plain text equivalent

Question 12

Cryptography

Answer 12

The science of designing cipher systems

Question 13

Cryptanalysis

Answer 13

Trying to find the plain text from the cipher text without the decryption key

Question 14

Break the code

Answer 14

Find the plain text from the cipher text by guessing or deducing the key