Securing Client/Server Transactions
The three basic ways that security is implemented in the area of client/server transaction. The first area is firewalls. The basic idea of a firewall to monitor traffic from a trusted network ( a company’s internal network) to an untrusted network (such as the Internet). Firewalls fall into two categories, “proxies” and “packet-filtering” firewalls. Packet-filtering determines whether a packet is allowed or disallowed depending on the source of the packet and the contents of it. Packet-filtering also looks at the source and destination ports, and to determine if a packet is part of an ongoing conversation.
An application-level firewall, better known as a proxy acts as an intermediary between the client and the server. The client application connects to the proxy. The proxy opens a connection to the server and passes information back and forth between the server and the client.
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Both firewalls have their advantages and disadvantages. In most cases both categories will be implemented on the same firewall. A packet-filtering firewall tends to be less secure than a proxy based firewall, since complete knowledge of the protocol is used by the application. However packet filtering can allow a concept known as masquerading. Masquerading is when the firewall takes the outgoing source address on the packets and converts the address so the receiver thinks they are talking to the firewall. The receiver’s packets will have it’s address on it coming back so the firewall can determine which sender gets the packet. The advantage of masquerading is that a company’s internal network can be hidden behind the firewall.
Another security implementation is encryption. Encryption is the process of modifying information so that it can not be read by anyone except the intended recipient. This is done by applying mathematical algorithms that require a “key” to unlock, or decrypt, the original data. Algorithms that use the same key to encrypt and decrypt data are known as “symmetric” encryption algorithms. Algorithms that use different keys to encrypt and decrypt data are known as “asymmetric” or “public-key” encryption algorithms. Encrypted data comes in two forms 40-bit and 128-bit. 40-bit encryption uses a 40 bits of space to encrypt data and 128 bits of space fo...
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...nloaded from the web server and automatically installed. The purchase and installation operations are separate operations each requiring their own JCM. The install JCM is usually a flat file because it does not normally contain any dynamic information.
#Install the cassette
Operation=Install
CassetteIdentifier=purchase_1.1
CassetteLocators.1=http://www.sun.com/purchase.jar
DependencyCassetteLocators.1.1=
http://www.sun.com/set.jcm
The CassetteIdentifier parameter is the unique identifier passed to myCassetteIdentifier method in the CassetteControl class implementation.
The CassetteLocators parameter is the location of the JAR file that contains the cassette, and the DependencyCassetteLocators parameter points to the insall JCMs for the cassettes on which this cassette depends.
References
Article:
Jackson, Richard. "Running Down the Up-escalator: Regional Inequality In Papua New Guinea." Australian Geographer 14 (May 1979): 175-84.
Pitts, David and Ball, Bill Red Hat 6 Unleashed. Sams, 1999.
Stapleton, Lisa and Pawlan, Monica. " Electronic Commerce, Part One: Getting into the Game" *http://developer.java.sun.com/developer/index.html *. May 1992.
Greig, A. & F. Lewins & K. White (2003), Inequality in Australia, New York: Cambridge University Press.
... Vote, supports women’s suffrage. The document states, “Give mother the vote… our food our health our play our homes our school our work are ruled by men’s votes”. The babies in this poster are saying that many topics that are being voted upon are those that women know the most about, and men know the least about. Therefore women should be able to vote. On the other hand, document H, Ladies Trousers makes fun of women for wanting the same freedoms that men have from birth. This document declares, “My dear Susan, would you please keep your trousers on your side of closet”. This document is not a reason for why women should not get the right to vote. Women should not have been classified as only mothers and wives, incapable of having any type of say in the society. Document G, better shows why women having a say in the community would benefit the society as a whole.
The morality of active euthanasia and whether or not it should be legalized is quite a controversial topic within the medical field that has long been debated by many philosophers. Active euthanasia is one of two forms of euthanasia, which is defined as the painless killing of a patient suffering a terminal illness that is considered incurable. Active euthanasia is when one actively brings about the death of a terminally ill patient through a specific act. This is in contrast to passive euthanasia, the other form of euthanasia, in which one merely ‘lets’ a terminally ill patient die by not doing the things necessary to keep the patient alive. I believe active euthanasia is both immoral and should not be legalized.
Analysing in depth, the Renaissance period in architecture stamps the retrospective regain of compositional principals of classic architecture and a return to a more canonica...
Presently, many cases of euthanasia had occurred around the world. Many a time we will stop and ask whether the person has anymore hope to live as a normal person. At the end it is left to the court to decide whether the people live or die. But why does the patient or the guardian choose euthanasia when they can live a longer time with their loved ones. Some might ask whether it is worth to see your loved ones suffering, wouldn’t it be better to end the suffering? To answer this question we must know what euthanasia means. According to Fergusson(1992) euthanasia which comes from the Greek word ‘eu-thanatos’ which means “well death” or “good death”(Fergusson, A. 1992). Besides that according to the oxford dictionary sixth edition (1986) the definition of euthanasia is to” bring about gentle death especially in the case of incurable and painful disease”. According to the Journal of the Americans Medical Association (as cited in BBC,n.d) there are more than one way of defining good death(BBC,n.d). This means that good death is define according to one personal view of euthanasia or when he is in a situation that is critical to his health. Some people want to die a death that involves less pain. According to BBC(n.d) voluntary euthanasia happens when voluntary death is define as the request for mercy killing is done (BBC,n.d). According to BBC(n.d) non-voluntary euthanasia happens when the patient is unconscious(BBC,n.d).
The Italian Renaissance included some of the greatest artists we have ever seen from Leonard Da Vinci, to Michelangelo, and Raphael. The Renaissance took place from the late thirteenth to sixteenth centuries and is know as the ‘rebirth’. The idea that the rebirth of the arts after being asleep for a thousand years is an amazing thing to grasp. This time brought back light to liberal arts, which were on the brink of being extinct. (Murray 2) What is also interesting about art during this time was that most of the art had Christian in its roots, for example, Botticelli’s The Allegory of Spring (Faure 1) is said to have had a Christian interpretation. (Murray) “Every Italian artist, willingly took the title of architect, sculptor, and painter” (Faure 2). At the beginning of the fifteenth century, the Italian painters had asked the Flemish painters for their secret techniques because the Italians felt like the language of painting was one that was always meant for them. (Faure 4) The sculptors claimed their inspiration from ancient works. Lastly the Renaissance introduced idea of individualism, which helped the Italians get away from everything that was going on during that time. Art during the Renaissance included painting, sculpting and architecture, all of which were an important part in expressing the idea of individualism and making art what is is today.
The packet-filtering firewall will keep out unauthorized data from entering the network and reduce the number of ports that are accessible by the users and outside threats.
The development of technology has brought Internet to become the mass communication media between people or companies. Through Internet, people can communicate with other people in various places. Companies can get many advantages by using Internet network to support their business. Therefore, companies are trying as hard as they can, and give high effort in protecting their network from attack and make sure that they have the best network security.
The Renaissance is my favorite part of history to learn about as the Renaissance was a time of rebirth that led to artistic and scientific enlightenment. Particularly in Painting, numerous of artist a rose creating new techniques and styles not used before such as fresco, tempera and oil paintings. Particulary the Works of the Italian Renaissance painter and architect Raphael,born Raffaello Sanzio on April 6, 1483, in Urbino, Italy and is now known for his most famous works in the Vatican in Rome, Italy. At the time of Raphale’s birth, Urbino was a cultural center that encouraged the Arts. Raphael’s father, Giovanni Santi, was a painter for the Duke of Urbino, Federigo da Montefeltro. Giovanni taught his young son Raphael basic painting techniques and exposed him to the principles of humanistic philosophy at the Duke of Urbino’s court. In 1494, when Raphael was just 11 years old, Giovanni died. Raphael then took over the daunting task of managing his father’s workshop. His success in this role quickly surpassed his father’s. Raphael was soon considered one of the finest painters in town. As a teen, he was even commissioned to paint for the Church of San Nicola in the neighboring town of Castello.
The key strategies and distinctive competencies that have led the company to success and its present position of a world leader in the Internet sales can be identified as follows.
To combat those threats and ensure that e-business transactions are not compromised, security technology must play a major role in today's networks. Why Networks Must Be Secured? Attacks: -. Without proper protection, any part of any network can be susceptible to attacks or unauthorized activity. Routers, switches, and hosts can all be violated by professional hackers, company competitors.
The screened host firewall combines a packet-filtering router with an application gateway located on the protected subnet side of the router.gif The application gateway needs only one network interface. The application gateway's proxy services would pass TELNET, FTP, and other services for which proxies exist, to site systems. The router filters or screens inherently dangerous protocols from reaching the application gateway and site systems. It rejects (or accepts) application traffic according to the following rules:
A firewall is a network device, hardware, software, or a combination of the two, whose purpose is to enforce a security policy across its connections. It is comparable to a wall that has a window where the wall serves to keep things out, except those permitted through the window. A security policy acts like the glass in the window; it permits some things to pass, light, while blocking others, air. The heart of a firewall is the security policy that it enforces.
According to WatchDog P: Network Security Glossary (2010) “A server that sits between a client application and a "real" server. The proxy server intercepts client requests and forwards them to the other server. Its purpose is two-fold: for outgoing traffic, it allows private, non-routable machines to reach a machine which can reach the Internet for them.”
“”A firewall protects networked computers from a third party intrusion that could compromise confidentiality. It may be both hardware and software program running on a secure computer. It has two network interfaces; one for the network is to protecting, and the other one it is exposed to. A firewall sits between the two networks a private network and a public network such as the Internet. They restrict access to any spread or damage that could be caused.