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Computer vulnerability

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Controlling Virus Infections In Internet And Web Servers A Triz Based Analysis, Umakant Mishra Jun 2012

Controlling Virus Infections In Internet And Web Servers A Triz Based Analysis, Umakant Mishra

Umakant Mishra

The viruses not only infect the stand-alone machines or client machines but also infect the web servers. When the web servers are infected with viruses, they disseminate infected content and thereby infect the client computers. The conventional anti-virus programs can run only on one machine. There is no way that an anti-virus in the client machine can determine whether the content of a website is virus safe or not. Hence, different methods are implemented to prevent the client computer from being infected by the infected content of a web server.

One proposed efficient method is to get scanned by the ...


Inventions On Generic Detection Of Computer Viruses -A Triz Based Analysis, Umakant Mishra Jun 2012

Inventions On Generic Detection Of Computer Viruses -A Triz Based Analysis, Umakant Mishra

Umakant Mishra

The conventional methods of signature scanning and heuristic testing depend on prior knowledge of individual virus signatures and virus behaviors. Hence these methods are capable of detecting only the known viruses or viruses behaving in known ways. Hence, these methods cannot detect the viruses unless they are created, released and infected the innocent users. This situation creates the need for generic detectors that can detect even the new and unknown viruses.

The generic scanning methods, in contrast, don’t depend on individual virus signatures or behaviors. Hence they are better applicable to detect the new and unknown viruses and viruses ...


Implementing Virus Scanning In Computer Networks, Umakant Mishra May 2012

Implementing Virus Scanning In Computer Networks, Umakant Mishra

Umakant Mishra

Some viruses exploit the features and capabilities of computer networks to spread, operate and damage network environments. For example, the virus may copy itself to other computers in the network or may increase network activities congesting the network traffic. The conventional anti-viruses are not efficient enough to detect and control viruses in a network environment. As they are file based they cannot scan the data while being downloaded from the server.

Most of the drawbacks of conventional scanning are taken care by a firewall-based virus scanning. But this method requires high-end machines to withstand the load of centralized scanning. There ...


Overcoming Limitations Of Signature Scanning -Applying Triz To Improve Anti-Virus Programs, Umakant Mishra Jan 2012

Overcoming Limitations Of Signature Scanning -Applying Triz To Improve Anti-Virus Programs, Umakant Mishra

Umakant Mishra

A virus signature is a sequence of bytes that may be found in a virus program code but unlikely to be found elsewhere. Signature scanning is a method of detecting a virus by scanning a target program to detect the presence of any virus signature. If the signature is found then the target program is deemed infected, otherwise the target program is deemed uninfected.

Signature scanning is the most popular method of virus scanning and is adopted by all anti-virus programs. Signature scanning is capable of detecting more than 80% of viruses. It uses a simple logic and uses less ...


Solving Virus Problems By Anti-Virus Developers- A Triz Perspective, Umakant Mishra Jan 2012

Solving Virus Problems By Anti-Virus Developers- A Triz Perspective, Umakant Mishra

Umakant Mishra

The anti-virus developers play a very significant role in dealing with the computer viruses. They analyze the problems of different levels of users and find solutions for each of those problems. Their goal is not just to sell the product and make profit out of it. They undertake much greater responsibility to ensure that their product meets the expectations of the users and deals with the viruses efficiently.

Different levels of users dealing with computer face different types of problems. The developer must ensure that the product meets the needs of various levels of users and network administrators. The developer ...


Improving Speed Of Virus Scanning- Applying Triz To Improve Anti-Virus Programs, Umakant Mishra Jan 2012

Improving Speed Of Virus Scanning- Applying Triz To Improve Anti-Virus Programs, Umakant Mishra

Umakant Mishra

As the number of viruses increases the amount of time to scan for those viruses also increase. This situation is worsened because of the increasing number of files typically stored in a computer system. Besides more complex tests are required to detect the modern day’s intelligent viruses. Thus a combination of all these factors makes a full virus scan very lingering and resource consuming. With thousands of types of viruses and gigabytes of storages, a typical virus scanning may take several hours. Because of this reason many users don’t like to virus scan their computers unless so required ...


Detecting Boot Sector Viruses- Applying Triz To Improve Anti-Virus Programs, Umakant Mishra Jan 2012

Detecting Boot Sector Viruses- Applying Triz To Improve Anti-Virus Programs, Umakant Mishra

Umakant Mishra

The boot sector virus infects the boot record of the hard disk or floppy disks. It gets loaded onto the memory every time the computer is booted and remains resident in the memory till the computer is shut down. Once entered it alters the boot sector of the hard disk and remains in the hard disk permanently until the system is totally damaged and fails to boot.

While analyzing the problem from TRIZ prospective we try different possibilities to avoid boot sector viruses, such as, Can we do away with boot record? Can we avoid booting from floppies? Can we ...


Solving Problems Of Virus Definition Files - A Triz Perspective, Umakant Mishra Dec 2011

Solving Problems Of Virus Definition Files - A Triz Perspective, Umakant Mishra

Umakant Mishra

Signature scanning is the most popular method of virus scanning and is adopted by all anti-virus programs. Signature scanning is capable of detecting more than 80% of viruses. It uses a simple logic and uses less memory and system resources. Although it has a lot of advantages, it has one big disadvantage. It requires the virus signature to be extracted by the experts and stored in a database called “virus signature database”. This virus signature database has to be updated by the anti-virus developers and the end users periodically in order to deal with the latest viruses.

A typical virus ...


Solving Virus Problems By System Administrators- A Triz Perspective, Umakant Mishra Dec 2011

Solving Virus Problems By System Administrators- A Triz Perspective, Umakant Mishra

Umakant Mishra

The computer virus is not only a problem to the end user but also a problem to everybody whoever is associated with computers, including systems administrators, corporate managers and even anti-virus manufacturers. In the previous article we discussed on how to use TRIZ for analyzing and solving virus problems of an end user. In this article we will focus on the problems faced by the systems administrators.

An analysis of virus scenario finds that the same situation of virus infection creates different problems to people at different levels, such as, a computer user, a system administrator, a corporate manager and ...


Solving Virus Problems By Computer Users- A Triz Perspective, Umakant Mishra Dec 2011

Solving Virus Problems By Computer Users- A Triz Perspective, Umakant Mishra

Umakant Mishra

The knowledge on TRIZ helps us analyzing a problem. Analysis is an important step in problem solving because the same event may be causing different problems (or benefits) to different people under different conditions. Some solutions may be addressing a problem in a short term or narrow perspective while giving rise to other problems or disadvantages. A good solution should be ideal and holistic in approach and should lead to no other problems or negative consequences.

When we analyze the problem of computer virus we find that different types of computer users face different types of problems and seek to ...


An Introduction To Virus Scanners, Umakant Mishra Aug 2010

An Introduction To Virus Scanners, Umakant Mishra

Umakant Mishra

The main functions of an anti-virus program are, (i) Virus prevention and file protection, (ii) Virus scanning and detection, (iii) Removing virus from infected files, and (iv) Recovering damaged files and objects.

An anti-virus program employs various methods to detect and remove viruses. The two popular methods of detecting viruses are signature scanning and behavior monitoring. However each of these methods has its strengths and weaknesses.

As the detection gets more sophisticated so are the virus programmers. The virus programmers also try to go one step beyond the anti-virus mechanism and create intelligent viruses which pose more and more difficult ...


Methods Of Virus Detection And Their Limitations, Umakant Mishra Aug 2010

Methods Of Virus Detection And Their Limitations, Umakant Mishra

Umakant Mishra

An anti-virus program typically employs various strategies to detect and remove viruses. The popular methods of detecting virus are signature scanning, heuristic scanning and integrity checking. However each of these methods has its own strengths and weaknesses.

Signature scanning (or searching of known virus patterns) is the most common method of virus detection. But it cannot detect viruses whose signatures are not available in the virus database. The other popular method is to use a heuristic algorithm to find viruses based on common behaviors. This method can be complex, but it has the ability to detect unknown or new viruses ...