Security Systems Essay Example for Free

Security Systems Essay System securities are a vital requirement in computers where a great problem in network security is experienced. There are more complexities in the distribution and array of computer network interconnections. This is usually experienced in different environments. Hence there is the need for having methods of solving the problem of system security. This is done through having a network interruption discovery where attacks are detected and the necessary measures taken into consideration. The three types of computer security protocols discussed in this paper are the Teredo protocol, the HTTP protocol and the SSL and TSL protocols. The security implications of these protocols are discussed in this paper. The computer security protocols are applied in different areas depending on the security protocol. The identification of these protocols provides security concerns where the control of security is required. There is need to reduce protection in depth and permitting for unsolicited traffic in the computer systems security controls (Aquino et al, 2008). Types of Protocol SSL TLS (Secure Socket Layer Transport Layer Security) protocol The Secure Socket Layer is an internet protocol for connections which are done from one indication to the other. SSL offers fortification besides tumbling of the roof space, interfering and counterfeiting. Therefore there is genuineness between the customer and the server since the client is able to institute a protected connection across the internet in order to offer fortification to the broadcasted information (Security Protocol Overview, 1999). Due to the increase in the stipulation of internet and digital information communication, a number of functions and workstations require to send out their information in a protected manner to inaccessible appliances and mainframes. This can be cracked by the use of SSL since it is well premeditated for the purpose in a criterion which is open. There are steps which take place in SSL and they include linking, confirmation between parties and finally, swapping over of the protected data. TLS (Transport Layer Security) is the latest improvement of SSL (Security Protocol Overview, 1999). Refer to figure 1 of the appendix. There is ensured discretion of the data due to the use of tough encryption expertise. There is lucidity substantiation of servers and clientele due to the use of digital credentials. The RSA algorithm used by SSL, it is meant to assist in the safety using autographs as well as digital pervasive. In support of extreme rapid encryption and decryption of data for communication after an establishment of SSL link, the suitable algorithm is RC4 (Security Protocol Overview, 1999). SSL can be used in any situation where protection is required between two computers. It can also be used in cases of clientele server co ordinations, monetary and movement business (Security Protocol Overview, 1999). HTTP (Hyper-Text Transfer Protocol) HTTP offers assistance of the starting point in the system since it proposes the path of origin of standard and persistent information prototype contrast sequence. In HTTP, there are a number of classes which are possible for the collapse of data (Alarcon-Aquino et al, 2005). They are inclusive of standard which involves regular conduct of the system order which involves no bother. Adjustment of trail entails adaptation of the address of a folder in order to make accessibility to impracticable (Embrechts, 1993). The cryptogram introduction requires that there is implantation of malevolent ciphers in the add-on of emails. Cross-site writing (XSS) offers access to the confidential IDs, passwords and usernames from different browser casements which are dynamic simultaneously. Finally, there is the prearranged question lingo (SQL) which provides modification of the catalogue, removing or even plagiarism (Torres, 2003, pp. 8-13). Refer to figure 2 of the appendix. Teredo Protocol This protocol is meant to offer assistance to the client to understand a material in a specific report. Teredo protocol works by channelling IPv4 UDP port for a segment of the system that is only IPv4. There are basic machineries which are consisted in the Teredo structures. The components include clientele, communications and servers (Hoagland, 2008, p. 7). Before the sending of packets to and from remote IPv6 nodes, some tunnel setup communication has to take place. Therefore there are phases which are followed which include, the customer completing the qualification procedure in order to establish the address of Teredo. Secondly, the client has to determine which relay to use for a given IPv6 per node. The afterwards, the packet is sent through the relay (Hoagland, 2008, p. 9). See figure 3 in the appendix Possible attacks Storage based attacks Computer security protocols can have attacks that have the possibility of bringing down the system. The attacks can lead the security system to queue up many packets hence leading the denial of service. This is because the attacks make the legitimate packets not able to be delivered or not able to reach new peers. The security protocol can be attacked by the storage based attacks. The attack holds information from reaching its destination (Hoagland, 2008, p. 24). Relay DOS Delays of information can be experienced when there is a condition of denial of service on a network based relay. If the relay is not available and a packet is send then there is no stipulation for the client for establishing a new relay. However, the peer would not be aware of a relay being used and would then send a packet to the address (Hoagland, 2008, p. 25). Server DOS Services can be denied through a brute force attack on the server processing speed or the band width. If the security qualification of the server has part of it as authentication value, then the computation is necessary in response to every qualification request which is valid (Hoagland, 2008, p. 25). Attack detection In detecting attacks in the computer security protocols the solution should be taken depending on which model is used fro detection. Detection models can be hot based model or network based model. The detection of attacks in computer security protocols depends on the model used. The models used in detecting the attacks in security protocols may either be host based models or a network based models (Aquino et al, 2008). When detecting attacks with hot based models, the interruption/intrusion detection systems (IDS) usually make their decisions based on the information which is obtained from either a single or multiple host systems. In the net work based model the decisions of the IDS are made by first monitoring the traffic in the network which is connected to the hosts. The computer security system protocols are dynamic and changing regularly. This makes it necessary to use an approach that is based on neutral networks. The neutral networks are found to do well in the recognition of pattern, classification and computations of tasks that are parallel. This is why the neutral networks are a collection of extremely interrelated processing elements (Aquino et al, 2008).

Is it right for celebrities to make a lot of money? Essay -- essays re

Over-Paid, Yet Under Rated   Ã‚  Ã‚  Ã‚  Ã‚  Growing up in America, many people are unaware of what is really occurring around them. People are so into their televisions, and their jobs that they fail to recognize the amount of work that is put into making this country as wonderful as it is. However, many people complain about the wages they receive hourly at work, or the salary they earn every month. Some complain that it is too low, and others complain about the taxes that are deducted, and how they do not have money to spend for occasions like Christmas, or even vacations. Then those same people sit at home, watch television, whether it is a basketball game, a game show, or even a soap opera, and complain about why those actors, athletes, and entertainers earn so much money, when they do not do as much as doctors, and teachers do. They complain about soccer players that are paid more monthly than doctors do yearly. They complain about singers that are paid for lip singing on stage, fooling many people. Ev en with their complaints, they sit down and watch the football game, watch the concert, and support actors, entertainers, and athletes. Why should those actors, entertainers, and athletes be paid that much money when they do not shape our future like teachers do, or save lives like doctors do? Unfortunately, for those people who complain, it is because of people like that, which cause people like Britney Spears, and Shaquille O’Neal to have more money than some people can count. It certainly is not fair that famous people such as Shaquille O’Neal, and Britney Spears earn so much money, but people cannot complain about it not being fair because unfortunately America is a very entertainment filled country, and almost everyone in the country has a favorite singer, band, athlete, team, or sport that they support, by either purchasing clothing, albums, tickets to the games or concerts, which makes the famous person earn that high amount of money.   Ã‚  Ã‚  Ã‚  Ã‚  The music industry is a very large industry in America, and it seems to be growing larger and larger year by year. A person may not have to go through four years of college to be able to sing a song, but either way they must work to earn what they do. An example of that would be the famous rapper Eminem. While growing up, Eminem had to work to support his mother because his f... ... so the people who complain will stop complaining about how those famous people get money, but will then begin to complain about why there are no good shows, or sports, or movies to watch on television any longer. There will always be complaints, but those who complain should be aware that they are the ones that cause those actors, actress, athletes, and entertainers to have the amount of money that they do. Works Cited Lawson, Terry. â€Å"’8 Mile’ Strikes Gold at Opening.† Detroit Free Press 11 Nov. 2002. 24 Nov. 2003. . Reinhold, Eric J. â€Å"A Game Plan for Working with Professional Athletes.† Journal of Financial Planning. Jun. 2000. 26 Nov. 2003. . Rovell, Darren. Official: Beckham Not Nearing Lifetime Adidas Deal. 11 Aug. 2003. 25 Nov. 2003. . Salary Cap for 2003-04 Season set at $43.84 Million. 15 Jul. 2003. 24 Nov. 2003. . Salomon, Yves Erwin. â€Å"Eminem, Mariah Carey & Jay-Z Make Top 10 of ‘Rocks 50 Richest 2003’ List.† Launch Music on Yahoo. 18 Mar. 2003. 25 Nov. 2003. . Specialists, not Generalists, Taking Home More Pay. American College of Physicians. 25 Nov. 2003. . Wilson, Bernie. â€Å"Bryant: ‘Terrified’ for case’s effect on family.† USA Today. 4 Oct. 2003. 25 Nov. 2003. . Is it right for celebrities to make a lot of money? Essay -- essays re Over-Paid, Yet Under Rated   Ã‚  Ã‚  Ã‚  Ã‚  Growing up in America, many people are unaware of what is really occurring around them. People are so into their televisions, and their jobs that they fail to recognize the amount of work that is put into making this country as wonderful as it is. However, many people complain about the wages they receive hourly at work, or the salary they earn every month. Some complain that it is too low, and others complain about the taxes that are deducted, and how they do not have money to spend for occasions like Christmas, or even vacations. Then those same people sit at home, watch television, whether it is a basketball game, a game show, or even a soap opera, and complain about why those actors, athletes, and entertainers earn so much money, when they do not do as much as doctors, and teachers do. They complain about soccer players that are paid more monthly than doctors do yearly. They complain about singers that are paid for lip singing on stage, fooling many people. Ev en with their complaints, they sit down and watch the football game, watch the concert, and support actors, entertainers, and athletes. Why should those actors, entertainers, and athletes be paid that much money when they do not shape our future like teachers do, or save lives like doctors do? Unfortunately, for those people who complain, it is because of people like that, which cause people like Britney Spears, and Shaquille O’Neal to have more money than some people can count. It certainly is not fair that famous people such as Shaquille O’Neal, and Britney Spears earn so much money, but people cannot complain about it not being fair because unfortunately America is a very entertainment filled country, and almost everyone in the country has a favorite singer, band, athlete, team, or sport that they support, by either purchasing clothing, albums, tickets to the games or concerts, which makes the famous person earn that high amount of money.   Ã‚  Ã‚  Ã‚  Ã‚  The music industry is a very large industry in America, and it seems to be growing larger and larger year by year. A person may not have to go through four years of college to be able to sing a song, but either way they must work to earn what they do. An example of that would be the famous rapper Eminem. While growing up, Eminem had to work to support his mother because his f... ... so the people who complain will stop complaining about how those famous people get money, but will then begin to complain about why there are no good shows, or sports, or movies to watch on television any longer. There will always be complaints, but those who complain should be aware that they are the ones that cause those actors, actress, athletes, and entertainers to have the amount of money that they do. Works Cited Lawson, Terry. â€Å"’8 Mile’ Strikes Gold at Opening.† Detroit Free Press 11 Nov. 2002. 24 Nov. 2003. . Reinhold, Eric J. â€Å"A Game Plan for Working with Professional Athletes.† Journal of Financial Planning. Jun. 2000. 26 Nov. 2003. . Rovell, Darren. Official: Beckham Not Nearing Lifetime Adidas Deal. 11 Aug. 2003. 25 Nov. 2003. . Salary Cap for 2003-04 Season set at $43.84 Million. 15 Jul. 2003. 24 Nov. 2003. . Salomon, Yves Erwin. â€Å"Eminem, Mariah Carey & Jay-Z Make Top 10 of ‘Rocks 50 Richest 2003’ List.† Launch Music on Yahoo. 18 Mar. 2003. 25 Nov. 2003. . Specialists, not Generalists, Taking Home More Pay. American College of Physicians. 25 Nov. 2003. . Wilson, Bernie. â€Å"Bryant: ‘Terrified’ for case’s effect on family.† USA Today. 4 Oct. 2003. 25 Nov. 2003. .

Pro Gun Control Speech Essays and Term Papers Essay

Pro Gun Control Essay Persuasive Pro Gun Control Essay Gun control is a vital necessity to the welfare of our nation. Many people out there are supporting the â€Å"anti- gun control cause† with the excuse of â€Å"self-defense†. I believe that not everyone will handle a gun for self-defense. The possession of a gun is†¦ Premium1048 Words5 Pages Gun Control Speech Gun Control Speech By Sam Casey Could we cure the mass gun killings in America by distributing a free, and very effective chill pill? Or is it just the insane people holding guns? The issues with the American Politics and gun control is that A- They don’t consider just putting guns in the hands†¦ Premium488 Words2 Pages Pro Gun Control Name Date Class Professor Pro-Gun Control With the Second Amendment giving American citizens the right to bear arms, and approximately fifty percent of Americans owning some form of a firearm, issues involving the ownership and possession of guns has led to debates in American society. Many†¦ Premium707 Words3 Pages Pro. Gun Control Lashea Williams 11/6/05 In some ways, gun control isn’t as irrational as it may seem. Even though it is said to violate the people’s second amendments right, which says, â€Å"A regulated militia being necessary to the security of a free state, the right of the people to bear arms shall not†¦ Premium713 Words3 Pages Gun Control Gun Control In 1988, Handguns killed 7 people in Great Britain, 19 in Sweden, 53 in Switzerland, 25 in Israel, 13 in Australia, 8 in Canada, and 8,915 in the United States. The figures are shocking, but what is the solution? Gun control is a problem that our country has faced for many years. In†¦ Premium2068 Words9 Pages Gun Control Is Needed Gun Control Is Needed Regulation of guns is a necessary action that needs to be taken in order to save lives. A good definition of gun control is needed to understand the sides and issues. Gun control is an effort to stop the rise in violent crime by strengthening laws on the ownership of f†¦ Premium1472 Words6 Pages Gun Control Gun control is a controversial issue, opposing and splitting the American society, it is a crossway of different arguments and states on whether there should be stricter gun laws. It could be argued that on the one hand guns provide safe and security, fun and adventure for some people; on the other†¦ Premium1061 Words5 Pages Gun Control Gun Control Issues With the Second Amendment giving American citizens the right to bear arms, and approximately fifty percent of Americans owning some form of a firearm, issues involving the ownership and possession of guns have led to heated debates in American society. Most notably is the is†¦

Understanding and Using Pointers in Delphi

Even though pointers arent as important in Delphi as they are in C or C, theyre such a basic tool that almost anything having to do with programming must deal with pointers in some fashion. Its for that reason that you might read about how a string or object is really just a pointer, or that an event handler such as OnClick, is actually a pointer to a procedure. Pointer to Data Type Simply put, a pointer is a variable that holds the address of anything in memory. To concrete this definition, keep in mind that everything used by an application is stored somewhere in the computers memory. Because a pointer holds the address of another variable, its said to point to that variable. Most of the time, pointers in Delphi point to a specific type: variValue, j : integer;pIntValue : ^integer;beginiValue : 2001;pIntValue : iValue;...j: pIntValue^;end; The syntax to declare a pointer data type uses a caret (^). In the above code, iValue is an integer type variable and pIntValue is an integer type pointer. Since a pointer is nothing more than an address in memory, we must assign to it the location (address) of the value stored in the iValue integer variable. The operator returns the address of a variable (or a function or procedure as will be seen below). Equivalent to the operator is Addr function. Note that pIntValues value is not 2001. In this sample code, pIntValue is a typed integer pointer. Good programming style is to use typed pointers as much as you can. The Pointer data type is a generic pointer type; it represents a pointer to any data. Note that when ^ appears after a pointer variable, it de-references the pointer; that is, it returns the value stored at the memory address held by the pointer. In this example, variable j has the same value as iValue. It might look like this has no purpose when we can simply assign iValue to j, but this piece of code lies behind most calls to Win API. NILing Pointers Unassigned pointers are dangerous. Since pointers let us work directly with computers memory, if we try to (by mistake) write to a protected location in memory, we could get an access violation error. This is the reason we should always initialize a pointer to NIL. NIL is a special constant that can be assigned to any pointer. When nil is assigned to a pointer, the pointer doesn’t reference anything. Delphi presents, for example, an empty dynamic array or a long string as a nil pointer. Character Pointers The fundamental types PAnsiChar and PWideChar represent pointers to AnsiChar and WideChar values. The generic PChar represents a pointer to a Char variable. These character pointers are used to manipulate null-terminated strings. Think of a PChar as being a pointer to a null-terminated string or to the array that represents one. Pointers to Records When we define a record or other data type, its a common practice also to define a pointer to that type. This makes it easy to manipulate instances of the type without copying large blocks of memory. The ability to have pointers to records (and arrays) makes it much easier to set up complicated data structures as linked lists and trees. typepNextItem ^TLinkedListItemTLinkedListItem recordsName : String;iValue : Integer;NextItem : pNextItem;end; The idea behind linked lists is to give us the possibility to store the address to the next linked item in a list inside a NextItem record field. Pointers to records can also be used when storing custom data for every tree view item, for example. Procedural and Method Pointers Another important pointer concept in Delphi is procedure and method pointers. Pointers that point to the address of a procedure or function are called procedural pointers. Method pointers are similar to procedure pointers. However, instead of pointing to standalone procedures, they must point to class methods. Method pointer is a pointer that contains information about both the name and object thats being invoked. Pointers and Windows API The most common use for pointers in Delphi is interfacing to C and C code, which includes accessing the Windows API. Windows API functions use a number of data types that might be unfamiliar to the Delphi programmer. Most of the parameters in calling API functions are pointers to some data type. As stated above, we use null-terminated strings in Delphi when calling Windows API functions. In many cases, when an API call returns a value in a buffer or pointer to a data structure, these buffers and data structures must be allocated by the application before the API call is made. The SHBrowseForFolder Windows API function is one example. Pointer and Memory Allocation The real power of pointers comes from the ability to set aside memory while the program is executing. This piece of code should be enough to prove that working with pointers is not as hard as it might seem at first. Its used to change the text (caption) of the control with the Handle provided. procedure GetTextFromHandle(hWND: THandle) ;var pText : PChar; //a pointer to char (see above)TextLen : integer;begin{get the length of the text}TextLen:GetWindowTextLength(hWND) ;{alocate memory}GetMem(pText,TextLen) ; // takes a pointer{get the controls text}GetWindowText(hWND, pText, TextLen 1) ;{display the text}ShowMessage(String(pText)){free the memory}FreeMem(pText) ;end;