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美国作业代写:Computer security Issues

2018-01-30 来源: 51due教员组 类别: Paper范文

下面为大家整理一篇优秀的paper代写范文- Computer security Issues,供大家参考学习,这篇论文讨论了计算机安全问题。随着国际互联网的迅猛发展,世界各国遭受计算机病毒感染和黑客攻击的事件屡屡发生,严重地干扰了正常的人类社会生活。因此,计算机的安全显得越来越重要。对计算机信息构成不安全的因素很多,其中包括人为的因素、自然的因素和偶发的因素。其中,人为因素是对计算机信息网络安全威胁最大的因素。

Computer,计算机安全,essay代写,paper代写,美国作业代写

With the rapid development of the Internet, the world has suffered from computer virus infection and hacker attacks, which seriously interfered with normal human society. Therefore, it is more and more important to strengthen the security of the network, the prevention of computer virus will be more and more attention of the world.

A computer virus refers to a set of computer instructions or program codes that are programmed or inserted in a program to destroy the computer or destroy the data, affect the computer's use, and reproduce itself. The characteristics of computer viruses are contagious, covert, latent and destructive. The computer virus detection method mainly has the artificial method, the automatic detection and the anti-virus card.

The security of computer information system includes the physical component, the information and the function of the computer.

The electromagnetic interference radiation of computer host and peripheral must meet the requirements of national standard or military standards. System software should have the following security measures: the operating system should have a better access control function to prevent users from unauthorized access to information, should have a good storage protection function to prevent users to work in the specified range of storage areas to read and write, but also have a better management capacity to record the operation of the system, Monitor access to data files.

The output control of data processing Department should be responsible for the person, the output file should be audited by data processing department before sending to the user, the output file should be issued with complete formalities, the most commonly used method of computer identification user is the password, so it is necessary to strictly manage the generation, registration and change of the password The system should be able to track all kinds of illegal requests and record the use of certain files and identify the terminals of illegal users. The computer system must have the complete log record, each successful use, must record the node name, the user name, the password, the terminal name, the machine time, the operation data or the program name, the operation type, the modification data value before and after.

Computer network security refers to the use of network management control and technical measures to ensure that in a network environment, data confidentiality, integrity and accessibility are protected. Computer network security includes two aspects, namely physical security and ROM security. Physical security means that system equipment and related facilities are physically protected from damage, loss, etc. The security of the ROM includes the integrity, confidentiality and availability of information.

There are many factors that make computer information unsafe, including human factors, natural factors and incidental factors. Among them, the artificial factor is that some criminals use computer network loopholes, or sneak into the computer room, misappropriation of computer system resources, illegal access to important data, tampering with system data, destroying hardware equipment, compiling computer viruses. Human factor is the most important factor to the security of Computer Information network. The unsafe factors of computer network mainly show in the following aspects:

The internet is open to the world's network, any unit or individual can easily transfer and access to all kinds of information online, the Internet is an open, shared, international characteristics of the computer network security challenges. Internet insecurity mainly has the following:

The network's openness, the network technology is all open, causes the network to face the attack from many aspects. Or an attack from a physical transmission line, or from an attack on a network communication protocol, and an attack on a computer software or hardware vulnerability.

The international nature of the network means that the attack on the network is not only from the users of the local network, but also from other countries on the Internet, so the security of the network is facing the challenge of internationalization.

The freedom of the network, most of the network to users of the use of no technical constraints, users can freely access the Internet, publishing and access to various types of information.

An operating system is an environment that is used as a support software to allow your program or other application system to operate normally above. Operating system provides a lot of management functions, mainly management system software resources and hardware resources. Operating system software itself insecurity, the system development and design of the flaws left, all to the network security leave hidden dangers.

The operating system itself has memory management, CPU management, peripheral management, each management involves a number of modules or programs, if there are problems in these programs, such as memory management problems, a connection to the external network, just connect a defective module, may be the case, the computer system will collapse. Therefore, some hackers are often targeted at the imperfect operating system to attack, so that computer systems, especially the server system immediately paralyzed.

The operating system supports transferring files, loading or installing programs on the network, including executables, which can also cause insecurity. A very important function of the network is file transfer functions, such as FTP, these installers often bring some executable files, these executables are human-written programs, if there is a loophole, then the system may cause crashes. Like these remote calls, file transfer, if the manufacturer or individual installed spyware on the above, then the user's entire transmission process, the use of the process will be monitored by others, all of these transfer files, loading programs, installed programs, execution files, can bring security risks to the operating system. Therefore, it is advisable to use as few software as possible with unknown origin or to prove its security.

One reason the operating system is unsafe is that it can create processes, support remote creation and activation of processes, and support the rights created by the processes that are created, which provide the conditions for installing "spyware" software on remote servers. If spyware is patched to a legitimate user, especially "hit" on a privileged user, hackers or spyware can keep the system process and the monitoring of the job out of the way.

The operating system has some daemons, which are some of the system's processes and are always waiting for certain events to occur. The so-called daemon process, for example, the user has not pressed the keyboard or mouse, or some other processing. Some monitor virus monitoring software is also the daemon process, these processes may be good, such as anti-virus program, a virus appears will be caught. But some processes are some viruses, a certain situation, such as the encounter July 1, it will be the user's hard disk format, these processes are very dangerous daemons, usually it may not work, but in certain conditions, such as July 1, it only happens, This is unsafe if the operating system has some daemons that are corrupted.

The operating system provides some remote invocation functions, the so-called remote call is a computer can call remote a large server inside some programs, can submit programs to remote server execution, such as Telnet. Remote call to go through a lot of links, the middle of the communication link may appear to be monitored and other security issues.

Backdoor procedures are those that circumvent security controls to gain access to programs or systems. At the software development stage, programmers use backdoor procedures of software to facilitate the revision of deficiencies in program design. Once the backdoor is exploited by hackers, or the backdoor is not removed before the software is released, it is easy for hackers to attack as vulnerabilities, resulting in information leaks and loss. In addition, the password-free access to the operating system is also a major hidden danger of information security.

While operating system vulnerabilities can be overcome by a continuous version upgrade, one of the security vulnerabilities of the system makes all security controls of the system worthless. A small loophole is enough to paralyze your entire network when it is discovered that the problem is up to the upgrade period.

Computer virus in the form more and more difficult to distinguish, the harm is increasingly serious, which requires network anti-virus products in technology more advanced, more comprehensive function. While computer network security is a growing problem in the process of rapid development of computer technology, China's scientific research institutions are widely carrying out this aspect of research, mainly anti-virus research, anti hacker problem research, computer network firewall technology, encryption technology, security mechanism. By then, the computing network will be more secure.

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