Computer network security and daily prevention

In recent years, along with the development of computer networks and communication technology, it not only brings great convenience to people's lives, but also enables people to enjoy more material and culture. At the same time, network security threats are becoming more and more serious, such as hacker attacks, data theft, and virus release. Although we are also using complex software technologies such as firewalls, anti-virus software, and intrusion detectors to avoid security problems, it cannot be completely prevented in both developed and developing countries, it has caused serious harm to society. This article mainly studies common information security problems, case analysis and detailed solutions related to computer network applications to improve our ability to control computer information security problems.I. Security Threats to computer network security (1) Threats to hardware systems and network environmentsPower supply faults, line interceptions, alarm systems, and other computer hardware system faults can easily affect the security of computer networks. In addition, each computer network operating system has a background management system, therefore, it is difficult to control the security risks of computer network operating systems. The computer network is designed to be an open and large-span environment with distributed control, resource sharing, and group exchange. However, this open and large-span network environment causes hacker and virus intrusion, it is easy to cause serious damage to the computer network. At the same time, because the computer network has a certain degree of concealment, the network users cannot accurately identify the real identity, which further increases the computer network threat.(2) Threats to network security caused by network communication protocolsCurrently, network communication protocol groups are the most important interconnection protocols in computer network interconnection protocols. Network communication protocol groups are used to connect different computer network hardware systems with different computer operating systems and provide support systems for computer network communication. However, because the computer network communication protocol is an interconnected and open protocol, and the network communication protocol is not fully considered in the design process, therefore, computer network security problems occur due to network communication protocol problems, and due to network communication protocol vulnerabilities, this further causes hackers and criminals to access the system and use TCP to steal important information and data in the connection process, causing serious damage to the computer network system, eventually, the computer network cannot work normally.(3) IP Source Path instabilityDue to the unstable IP Source Path in the computer network operation, it is easy for hackers and criminals to change the original IP address base when they use the computer network to send information or important data, as a result, important information and data sent by users are sent to IP addresses modified by illegal users to obtain important user data and obtain illegal benefits.Ii. Analysis of computer network security prevention and daily maintenance measures (1) reasonably configure the firewallIn a computer network, you can configure a firewall to control the computer network based on the access scale of network communication, so that the visitor and data can be clearly entered into the network system, it can immediately intercept prohibited or other illegal elements and data, so as to effectively prevent hackers or illegal elements from accessing and damaging the network. As an effective network security mechanism, firewall has been widely used in network systems to prevent computer network insecurity.(2) security authentication methodsTo ensure the confidentiality of information in e-commerce, the digital envelope technology is used; to ensure the integrity of E-commerce information, the Hash is the core of the digital digest technology; digital timestamps are used to ensure the effectiveness of e-commerce information. digital signature technology is used to ensure that communications in e-commerce are undeniable and non-repudiation; to ensure the identity authentication of all parties in e-commerce transactions, a CA authentication system is used. In this way, digital authentication can be issued to all parties in e-commerce transactions, and the cooperation of security protocols is also required, common security protocols include Secure Sockets Layer SSL protocol and Secure Electronic Transaction SET protocol. In addition, because the Administrator account has the highest system permissions on the computer network, Hackers often steal accounts and destroy computer programs. To prevent this network threat event, you should first set a complex and powerful password on the Administrator account or rename the Administrator account, finally, you can create an Administrator account with no management permissions in the system to cheat intruders. This will cause intruders to fail to determine whether the account has Administrator permissions, in this way, intruders can reduce damage to the computer network and important information in the system.(3) encryption technologyThe implementation of computer network encryption technology is a preventive measure designed to prevent network information and data leakage. Encryption technology converts plaintext data in computer network systems into encrypted data according to certain conversion methods. The traditional encryption technology is mainly based on packets. Compared with the traditional encryption technology, this encryption technology not only has unique requirements, moreover, the large database management systems of this technology mainly use Unix and WindowsNT. the security level of the encryption technology's operating systems can be divided into C1 and C2, they all have the function of identifying users, registering users, and controlling users. In computer network systems, although DBES can add security measures to the System Based on OS, it still has certain security risks for computer network database systems, viruses and hackers generally cause harm to the database from these subtle vulnerabilities. encryption of sensitive data can effectively ensure data security, this ensures the safe and reliable operation of computer systems.Iii. SummaryComputer network security and reliability have always been a hot issue of research. Computer Network Security issues directly affect the development and application of computer technology. Although there are many products and technologies currently used for network security, there are still many hacker intrusions and virus infections. Therefore, we should constantly study new computer network prevention measures, implement advanced computer network technology and computer system, and strengthen daily computer protection, in this way, computer network security and information data security can be protected, which brings great convenience to computer users and truly enjoys the advantages brought by network information.