Question

Session 6.2 Quick Check

1. What is a digital certificate?

2. A self-replicating and self-executing program that sends copies of itself to other computers over a network is called a(n) ______________.

3. Describe malware and name three examples of it.

4. What is a web bug and how can it pose a security risk?

5. What is a firewall?

6. How can you tell that a webpage you are viewing with a browser is secure?

7. What is a server certificate?

Answer 1

1) A Digital Certificate is an electronic document which will be used to prove the ownership of a public key with the entity that owns it. Digital certificate allows a person or organisation to securely exchange data over the internet using public key encryption. It is also called a public key certificate. It contains information about the key, information about the identity of its owner, and the digital signature of issuer.

2)A self-replicating and self-executing program that sends copies of itself to other computers over a network is called a worm.

3) Malware is the short form for malicious software, which is created to access a computer systems usually without user/admin's permission. Most common malware are viruses, worms and Trojan horses.

4)A web bug or a web beacon is a file object that will be place on a web page or an email to monitor user's activity. It will be a security risk because that small images has to be downloaded from the sender's server when the message is opened they can send the time and frequency of the recipient activity. Unlike a cookie user can not control the download. It can sent important information like recipient's IP, web activity and type of browser etc.

** 4 subparts per question can be answered**