The status of computer network security and prevention

Abstract: Computer Network access has developed rapidly in recent years. In the course of the rapid development of network, network Technology matures makes network connections easier, and people enjoy the convenience of the same network, Network Security is increasingly under threat. Network Security has become a potentially huge problem, safety situation should be cause for concern.

Keywords: Computer Networks, security, Technology

Now, Computer communication networks and Internet has become the fabric of our society a fundamental component. Networks are used in various aspects, including electronic banking, electronic commerce, the modern enterprise management, Information services and so on the basis of a Computer Network system. Safety sex is a very critical Internet Technology is very easy to be overlooked. widely used in networks today, we should also understand Network Security, preventive measures, good network of Information confidentiality, integrity and availability.

First, the meaning and characteristics of Network Security
(A meaning.

Network Security refers to the network hardware, software and system data is protected, not because of accidental or malicious reasons, suffered damage, change, disclosure, continuous and reliable system to run properly, the network service is not interrupted.

(B network security should have the following five characteristics.

Confidentiality: Information is not disclosed to unauthorized users, entities or processes, or for their use features.

Integrity: data can not be changed without authorization features. That Information is maintained during storage or transmission is not modified, will not be damaged and missing features.

Availability: authorized entities can be used to access the features according to demand. That is, when necessary, can access the required Information. For example, denial of service network environment, network and destroy the normal operation of the system belong to the availability of the attack.

Controllable: the dissemination of information and content with the control.

Reviewability: emerging security issues and means to provide the basis
Second, the status of network security and network security threats
(A Network Security Analysis.

Internet and network Applications growing at a rapid pace, the increasing popularity of network Applications and more complex, network security problem is the development of Internet and network Applications face important issues. Network attacks becoming increasingly complex ways of merging and the network security defense more difficult. more organized hacker attacks, attacks from the simple pursuit of "sense of pride" to the many practical benefits for the direction of transfer, online trojan, spyware, malicious websites, phishing, etc. The emergence and increasing proliferation of mobile phones , PDAs and other wireless terminals and functional capacity increased versatility, making it an increasingly close to a personal Computer, wireless terminals for these attacks have begun to appear, and further development. In short, network security issues become more complicated, the impact will expanding, it is difficult fully resolved in the short term. In short, the security issue has been placed in a very important position, network security, if not prevent, it will seriously affect the Application of the network.

(B network security threats.

Threats to Computer Networks are many, both in the information network threats, including threats to the network device, can be summed up three main points: First, unintentional human error. If the operator caused by improper security configuration System security vulnerability, the user security awareness is not strong, password selection inadvertently, to their own account or with others, freely transferable shares and so would pose a threat to network security. The second is man-made malicious attacks. This is also the face of Computer Network the greatest threat, such as the adversary's attacks and Computer crime are likely to be. Third, the network software vulnerabilities and the "back door." Any piece of software are more or less vulnerable, precisely these deficiencies and vulnerabilities to hacker attacks preferred target. most of the intrusion as security measures are perfect event, no make up time due to loopholes in the system. In addition, the software company's programmers set to facilitate software maintenance and "back door" is also a huge threat can not be ignored, Once the "back door" wide open, people can freely enter the system, the consequences could be disastrous.

Third, Computer network security countermeasures
(A) specifying the network security objectives.

To solve the network security, we must first clear goals:
(1 Identity authenticity: authenticity of the identity of the communication to identify entities. (2 confidentiality of information: to ensure that confidential information is not revealed to unauthorized person or entity. (3 information integrity: to ensure data consistency and prevent non- authorized users or entities for any damage to the data. (4 Service Availability: legal support to prevent the use of information and resources were improperly rejected. (5 non-repudiation: to establish effective liability wit, to prevent the entity deny their behavior. (6 systems controllability: the ability to control the use of resources person or entity to be used. (7 System Ease of use: conditions to meet safety requirements, the system should be simple and easy maintenance. (8 to review: on the network in question security issues and means to provide a basis for investigation. Links to Research Papers Download http://www.hi138.com (b using the corresponding network security Technology to enhance security.

(1 virtual network Technology, network monitoring based intrusion prevention tool. (2 using firewall technology to protect networks from hacker attacks. (3 using anti-virus anti-virus technology, virus scanning and anti-virus. (4 by providing real-time intrusion detection technology Intrusion Detection and take necessary protective measures. (5 security scanning technology, network security vulnerabilities that provides a powerful support. (6 using authentication and digital signature technology. authentication technology to solve network communication as the process of recognition of both communications, digital signature technology for communication in the process of achieving non-repudiation requirements. (7 using VPN technology. We will use the public networks of the private network is called a virtual private network VPN. (8 by Application of security technology to ensure that e-mail application platform and operating system security.

(C develop network security policies and regulations, universal Computer network security education.

As the highest level of global information, the United States attaches great importance to information systems security, to ensure the security of information systems as a national security strategy, one of the most important part, has taken a series aimed at strengthening the security of network infrastructure security policies and measures . Therefore, it is necessary to ensure network security network security laws enacted, and to increase investment in strengthening the management to ensure information system security. In addition, the popularity of computer network security should focus on education and enhance people's awareness of network security.

IV Conclusion
In short, network security is a comprehensive issue, involving technical, management, use and many other aspects, both the security of the information system itself, but also the physical and logical technical measures, a technology can only solve one problem, but not everything. With the computer technology and network technology has penetrated into all areas of society, the activities of human society's dependence on computer networks has been growing. strengthen social safety education, universal education in computer network security, improve computer the level of network security technology, improve its security situation, a top priority.

References:
[1] Yang Yixian. Network Security Theory and Technology [M]. Beijing: People's Posts and Telecommunications Press, 2003.

[2] Zhang Shiyong. Network Security Principles and Applications [M]. Beijing: Science Press, 2003
[3] Cheng Yu Hang. Computer Network and Information Security Technology [M]. Beijing: Mechanical Industry Press, 2008. Links to Research Papers Download http://www.hi138.com