round up of virus session.

Before I attend the session on virus, I thought Windows Vista is so stupid, always asking me for permission. Then Dr Liang showed us that it is necessary to prevent my computer being utilized by third party.

I should say it was like watching a scary movie, besides we are told we will be the next possible victims. Firewalls and anti-virus only stop the hackers to some extent. Hackers have many ways to attack a system, it only takes them few seconds to control a computer. The conclusion is that we need to know more about the computer so that we can detect suspicious behaviors.

Hackers can attack directly, however this can be stopped most of the time by firewall.

Hackers can also use holes in computers such as to create files with hidden sub-fix to craft the virus in the way to make use of the hole to get control of the computer.

Hackers can make use the spill over of the code on memory.

overflow of data ---->spill over data on different location on disk -------->happen to be the execution code region ---->the original execution code is overwrite by the hacker's code.

Hackers can attack server by using large zombie network to send request to server, then the server will crash. One method is called DDOS.

In a world where e-business is becoming the trend, hackers have the interest to attack other computers so as to get the important information such as account and password. That makes it more important to have a safe secure system for the users. However, we as computing students, need to know more about the computer, that is the safest firewall in the world.


In the national level, strategic information stored in computer can be stolen by hackers of other country, and the cyberspace has becoming a new battle field. Recently, S.Korea announced that they are going to form a strategic information command centre.

I hope even if we have the power to attack a computer,we shall use it in a more responsible way. Besides, the legal system is catching up with the technology, it risks your future to be a hacker.

written by Shiyu and Jiangkuo