Intrusion Detection System Essay Example for Free

Intrusion Detection System Essay Introduction There are several security systems that were developed to resolve serious issues pertaining to the safety of a particular network or organization structure. Malicious attempts to access and make use of such systems without permission from the owner of the said network have been damaging to numerous businesses and have exposed a lot of highly confidential files. As a result, more money has been lost and profits have been decreased greatly. However, many companies are still clueless about the ways on how to stop this information technology theft and the computer hackers continue to proliferate from this illegal works. One of the solutions that are currently available to resolve the abovementioned problems is to utilize a software-based intrusion detection method. This can also be a mixture of both hardware and software implementation dedicated to stop any unwanted access to information by any user attempting to get in on the said system. It is also intended for detection of any malicious wares that is being injected into the computer system. In addition to that, any attack even from authorized personnel who deliberately destroys the files and data in the network are also being identified by the said infringement recognition scheme. There are several modules that are being integrated to establish an intrusion detection system. One of the major parts of an intrusion detection system is the transducer. These transducers are devices that are responsible for producing logic information on the system. Its major role lies on the sensitivity of the said sensors being used for detecting such harmful files or manipulations. Another module that is a part of the anti-intrusion scheme is the monitoring system that is in charge of controlling the transducers or sensors. It also provides periodic observation of any event that occurs on the area covered by the system. The next module that completes the intrusion detection system is the central processing structure. This records the observed events by the monitoring system and processes the appropriate response for the said network stimulus. This also decides if there will be approval or denial of access and service. Anti-Intrusion Scheme Terminologies There are terminologies that are associated with the intrusion detection system. Alarm or alert is a term used if there is an attack detected by the system. True attack stimulus is a phrase that is used to describe an incident that causes the anti-intrusion system to send an alarm signal and respond accordingly similar to the real aggression happening. False attack stimulus, on the other hand, is used when the intrusion detection scheme produces an alert response even when there is no attack occurring. False positive is the phrase used to describe when an alarm was made by the system even there is no actual system attack occurring while False negative is used when there is a failure on the part of the system to detect an actual assault on the system. Noise is the term used that interferes the original data and that can cause false alarm on the system. Another terminology used in the system is the site policy wherein it includes the guidelines and regulations that covers the entire organization that has an intrusion detection system. Site policy consciousness is the terminology used to describe the ability of an anti-intrusion scheme in a continuous changing environment. Intrusion Detection System Types Several variations of intrusion detection scheme were already developed and each has its distinct approach and modules like sensors, processors, and monitor devices. Each type has its own system processes depending on the need of the corresponding network being served by the said computer security systems set-up. Hybrid types or combination of two types is also being used by some networks to establish their need for network security system. Classification of Intrusion Detection System Source: www. windowsecurity. com Network Intrusion Detection System A network intrusion detection scheme is a type of an anti-intrusion arrangement where the transducers are strategically located in critical points being covered by the system. Particular borders are also recognized on the network systems that are considered prone to malevolent traffic flow of information. Protocol-Based Intrusion System The protocol-based intrusion scheme is a network intrusion category that processes on the protocols for any improper or unlawful message flow or any sort of unlawful access of the network. The sensors used with this type of system are placed at the front section of the server network to be able to analyze communication protocols between connected computer devices. In a web-based network, the protocol being observed is on the internet protocols being used to interconnect the said system set-up with other networks also linked to the internet. Application Protocol-Based Intrusion Detection System This type of anti-intrusion set-up comprises of approaches where the monitoring system is focused on a specific type of protocols particularly under the highest layer in the OSI model which is the application layer. This scrutinizes the application layer software being used in the system against any sort of illegal activities that can be damaging to the system as a whole. Host-Based Intrusion System The hot-based intrusion system focuses all the monitoring efforts on the activities made by the hosts where various software installations are located. It also looks on application logs and other file variations for any intrusion states. Passive System against Reactive System A passive anti-intrusion system provides an alert signal once a particular sensor detected a likely network security violation. It also log important information related to the said detection for future references on the said intrusion attempt. On the other hand, a reactive intrusion detection system provides a more responsive approach on the network infringement attempt on the set-up. The said reactive system makes some real-time adjustments to counter the said intrusion like resetting the link or the firewall program that would be necessary to maintain the security within the network. Such adjustments occur instantly, depending upon the pre-programmed responses of the intrusion system on the said network infringements. An intrusion prevention system differs a lot from a conventional intrusion detection system because the first looks for any possibility of harming the system before the subjected program or software enter the system while the latter only detects for the any possible intrusion after the entrance of the said suspicious programs. With the use of firewalls, they filter the programs that might pose risks on the network and denying access from any unknown sources or unreliable hosts. Invasion prevention scheme can also be classified under a specific firewall application layer. Intrusion detection structure uses two common methods in detecting any anomaly in the system. One of these methods includes the statistical process of determining whether a network infringement occurred in the system. This approach is called statistical anomaly-based technique. Another method that is also being employed in the intrusion recognition system is the signature-based technique. Under this approach, any network attack is being recognized through familiar patterns which are acknowledged as system attack signatures. Many of these identified attack signatures are being held in the database of a computer system for future references and further detection will be much easier for detection of these familiar network intruders. Moreover, the lists of these signatures are continuously being renewed to ensure the validity of the threat signatures on the system. All intrusion detection modules have constraints in their overall routine and efficiency in performing its duties to detect network anomalies in the system. One of the limitations that hinder the effect of anti-network hacking system is the noise that degrades the reliability and sensitivity of many of the intrusion detection schemes. There is also inherent noise on the system that should be controlled to be able to produce better detection results. Corrupt data and inefficient recognition of potential intruders are some of the problems resulting from the proliferation of noise in the entire network security set-up. Another problem is that real threats on the network system occurs less frequent compared to invalid risks that also appear on the system. Because of this, anti-intrusion systems sometimes neglect the real warnings and looked at it as another false attack where problems begin to propagate. The next limitation is on the need for regular updating of threat signatures. Without such efforts, some agents that causes harm to the entire system would easily passed on the security line because the said network anti-infringement scheme do not have the update information on the current or new harmful agents that might inflict damage to the system. Anti-intrusion techniques can also be bypassed by other means and this can be done on several ways. One of the techniques is to develop more network attack procedures as a product of thorough research on the current protection systems. Loopholes in the anti-intrusion schemes are also valid grounds for development of new approaches on how to circumvent the security hurdles implemented by the said anti-intrusion procedures. (www. ) Developments on Intrusion Detection System A lot of advancements in the field of intrusion recognition system are being made to resolve the key issues in the said system. Various ideas continuously undergoes experimentation for further testing and implementation once the test results appear to have passed all the standards set by the authorized technical agencies. One key development in the field of network security system is the inclusion of access logs for to be able to trace any anomaly that occurred during the entire operation of the network. In the year 1984, another valid finding was made with regards to the possibility of network attack anomalies with the increasing amount of memory being used. It was stated that the need for more resources that can be used to scan and monitor the entire system. Two years after, a model was structured and made available by a computer network professional defining the over-all composition of an anti-intrusion scheme. This model was adapted by many companies and implemented on their own respective systems. The model utilized appropriate mathematical tools that analyze data statistically. Neural complex algorithm is also being integrated into the anti-intrusion structure to have a more interactive approach in dealing with network violators. This neural set-up poses more advantages compared to the mathematical approaches. (www. windowsecurity. com) Conclusion Intrusion detection system plays a vital role in managing a network communications structure of companies. Though the scheme has complexities in terms of the processes and the modules included in it, the anti-intrusion system still has greater benefits compared to the aforementioned intricacies of the said system. Various developments are still under way in order to enhance the procedures of detecting network anomalies that are trying to implicate the system. Competent people should also be assigned on this task of monitoring the flow of the network because much responsibility is assigned on maintaining the entire system hack-free. Continuous upgrading on the approach should also be made regularly to ensure that they are in pace with the network violators and its illegal schemes to get access on the confidential data and files of a network. Moreover, system hardware and software should also be updated on a regular basis to avoid lapses on its primary function as an anti-network infringement system. References Intrusion Detection Scheme. Retrieved on April 26, 2009, Retrieved from www. windowsecurity. com Elson D. : â€Å"Intrusion Detection, Theory and Practice. Retrieved on April 27, 2009. Retrieved from http://online. securityfocus. com Frederick K. K. : Network Intrusion Detection. Retrieved on , April 28, 2009. Get well soon www. webonline. securityfocus. com.

In An Inspector Calls J.B. Priestley has a message to deliver, what :: English Literature

In An Inspector Calls J.B. Priestley has a message to deliver, what is this message and how does he deliver this message? In the play 'An Inspector Calls' the playwright John Boynton Priestley, uses real people in artificial situations to create the well-rounded performance, he does this so effectively because the people of the time could relate to these situations, setting and the issues raised but could also place themselves in the play with each person in the audience becoming an actors. We are constantly kept on the edge, never knowing what to expect next. He does this by using many complex dramatic devices in order to give the correct information to the audience and actors and deliver it with pinpoint timing. In this family situation the inspector is able to manipulate it by knowing the significant weaknesses and personalities of the individual family members. He shows the family cannot communicate with each other when put in a tense or uneasy situation. One of the devices he uses is the constant use of small climaxes where the audience believe they have found the major culprit then the line of enquiry jolts off into another direction this makes the play both captivating and interesting. This is shown in the way it holds the audience all the way through, building up slowly with peaks, gathering the complex plot as it goes along, then finally ends in a stunning climax with a twist. Throughout the play the inspector is extracting small threads of information from each member of the family and slowly interweaves the small threads to form one big picture, once the picture is formed the audience can narrow it down to the main culprit this acts as the first conclusion of the play, but once the audience have realised that there isn't one culprit but instead the whole family are guilty for her death this really drives the message home. The inspector uses a photograph very cleverly because the family believe that the inspector is showing the same pictures to everyone, as an alternative these could be pictures of different people. After the inspector has carried out all his investigations the family is split into two sections, one being the people who are sorry for all the hurt and pain they have caused, these are the people that have taken in Priestley's and the inspectors message, the socialists. On the other hand the other group are the elders that are stuck in there old fashioned ways and believe that society functions better as individuals and not a team these are the people that Priestley is rebelling against, the capitalists, the money driven people who don't

Cognitive Design Essay

A Thousand Splendid Suns by Khalid Hosseini is seen through the eyes of two young female protagonists, who have a strong and well-developed character. In the novel, the author shows their hardship, their lives in a hopeless society, Afghanistan, and how throughout their life they face cruelty and vulnerability. The author portrays the experiences of the two Afghan women, Mariam and Laila, who live in a society where women are mistreated. Mariam’s character is described as a quiet and thoughtful girl who questions the society and dreams of a luxurious life. She experiences physical and mental abuse from almost every person in her life and is brought up in an isolated environment by a bitter mother who puts her down. For instance, in the beginning of the novel Nana, Mariam’s mother, says: â€Å"You are a clumsy little harami† (Hosseini, 4). This very word â€Å"harami† helps the reader to analyze the struggles of an illegitimate child. Nana also prepares Mariam to expect nothing from men: â€Å"Like a compass needle that always point north, a man’s accusing finger always finds a woman. Always †¦. Mariam† (Hosseini, 7). This is also used to foreshadow Mariam’s husband, Rasheed, a cruel, abusive and hot tempered man, who physically and verba lly abuses Mariam after marriage. Although Laila was also brought up in the same society as Mariam, her character is stronger as compared to Mariam’s. She has a strong desire to use her intelligence and education to improve the society and as her father, tells her: â€Å"Marriage can wait, education cannot†¦ You can be anything you want†¦ Because a society has no change of success if its women are uneducated†¦ No chance† (Hosseini, 114). The characters personality evolves over time, and this helps to analyze the tragic themes of the novel which are oppression, hope, and internal strength of women. The ability for any individual to imagine to endure the pain and sacrifices that Mariam and Laila endured are overwhelming. Yet the authors’ description of the characters makes it easy to analyze them to a great depth.

The Dangers of Scuba Diving and Underwater Exploration Essay

Scuba diving can be a fun activity, you just have to take certain health and safety precautions. There are lots of dangers in scuba diving, and underwater exploration. There is always the danger of a shark attack. Sharks are closer to the banks during the months of April through September. From the months of October through March, they have migrated South for the Winter. After returning from migration, sharks are often hungry and tend to feed on things other than whats on their diet. Most attacks on humans are in the months of April and March. One of the main staples on a sharks diet is a sea turtle. When a diver is in all of their gear, sharks mistake them for sea turtles. Although a shark attack is a danger, it is not very†¦show more content†¦This happens because the deeper you dive into the ocean, the higher the pressure is on your ears. Diving in high pressure for long periods of time can also cause permanent hearing loss. Diving has many pros and cons. Chambers page.2 Not everyone can dive. Diving take many months of training. Training usually lasts up to three to four months. During the first month of training, you will practice your swimming skills. An instructor will test your ability to withstand certain conditions while in the water. They will test your ability to with stand strong currents, and big waves. You will also be taught what to do if you become tired or dizzy while diving. If you do become tired or dizzy while diving, you need to lie on your back and float. During the second month of training, you will practice breathing at different pressure points, and altitude. Diving in deeper water makes it harder to breathe, and without proper training, can cause dizziness or unconsciousness. During the second month of training, you will learn about all of your scuba gear. You will learn how to put it on, and how to use it. Scuba gear can weigh up to seventy five pounds. If you arent muscular enough, the weight of the scuba gear can weigh you down, and cause you to be tired or drown. Months before training to dive you should go to a gym and try lifting weights, and improve your leg and arm muscles. (â€Å"Gear†) During the thirdShow MoreRelatedBecoming a Marine Biologists1603 Words   |  6 Pageslife. During the Renaissance period, Europeans started to explore the world. At first the exploration was about conquering the new land and traveling to different lands, but over time the explorers became curious about the ocean and what was in it. Soon explorers began to take Naturalist on their explorations to make scientific discovers about the ocean and lands. By the mid eighteen hundreds explorations were being funded solemnly for scientific research. As an alternative to working on boats whereRead More The Physics Of Scuba Diving Essay example4570 Words   |  19 PagesHave you ever wondered what it would be like to swim with the fish and explore the underwater jungle that covers two-thirds of the earths surface? I have always been interested in water activities; swimming, diving and skiing, and I felt that scuba was for me. My first dive took place while on a family vacation. I came across a dive shop offering introductory dives, which immediately caught my interest. After much convincing (my parents), with my solemn assurance that I would be careful, IRead MoreA Report On The Underwater World1833 Words   |  8 Pagesplunge. The underwater world takes on a new persona as its inhabitants are magnified through my goggles. Bubbles float up past my head as I slowly and deeply breathe through my regulator while keeping my body neutrally buoyant to prevent myself from touching the marine life below. My fins cut through the water as they attempt to propel me against the strong ocean current over large kelp forests. Fish of all shapes and sizes swim up to investigate who I am and what I am doing in their underwater world.Read MoreThe Legacy Of World War I3570 Words   |  15 Pagessank so quickly. His biggest obstacle: The Irish government, which has fought him for years over his plans to explore the wreck. It was a kiss Gregg Bemis will never forget. It happened in 2004. Bemis, 76 years old at the time, was wrapped in diving gear, floating at the bottom of the Irish Sea. He took out his mouthpiece, knelt carefully on a slab of encrusted steel, and planted a fervent if wet smooch on the hull of the Lusitania—the elegant passenger ship that was sunk by a German submarine