Now, China has entered a new era of informationization and technology. At the same time, computer technology and information technology have also been greatly developed. At the same time, with the further development and innovation of science and technology, our life, work and study are more convenient and efficient. The following is what I arranged for you for your reference.

Fan: Challenges facing computer security at this stage Abstract With the progress and development of modern science and technology, modern information technology has been gradually applied more widely. While bringing convenience and speed to people's lives and work, computer security issues also directly affect the information security of computer users. This paper analyzes and studies the problems existing in computer security in the new period.

Keywords new period; Computer Security Problems and Solutions: Challenges

Introduction to 0

With the application of computers in various fields, the number of computer users is increasing gradually, and more and more important information is stored by computers, so it is an urgent task to solve and prevent computer security problems. Computers are vulnerable to hackers and viruses, which will not only affect the security of computers, but also affect the information security of users, causing great harm to users. Therefore, the security of computer must be worth pondering and studying.

1 Definition and composition of computer security

Computer security is actually the technical and management security protection of data processing system, which protects computer hardware, software and data from being destroyed, changed and exposed due to accidents or malicious reasons. Computer security is mainly divided into two parts, one is computer network, and the other is computer built-in system. Among them, computer networks suffer the most data destruction, so we should focus on the security of computer networks. In fact, the built-in computer system refers to ensuring the normal operation of the computer, ensuring the safety of users during use, and the safety of the computer itself. Among them, whether computer security can be realized is closely related to the system installed in the computer; The safety of users is closely related to electromagnetic waves, and the use of computers with strong electromagnetic waves is likely to cause personal safety problems. The security problem of the computer itself refers to the environmental problems around the computer when it is used, and it is necessary to exclude the computer from being damaged by external objective factors. Computer networks are not restricted by regions. No matter where you are, your computer may be attacked and violated by hackers. Because computer networks are internationally connected, computer network security is the responsibility of all computer users. After the discovery in recent years, the frequency of computer being destroyed by hackers is getting higher and higher, so we must pay attention to computer security and avoid computer security problems.

2 computer security problems to be solved

2. 1 computer hardware security issues

At present, the problems to be solved by computers in the new era are mainly divided into four types: one is the chip problem, that is to say, some chips with great security risks are implanted in the core part of the computer. Once these chips are implanted in the computer, they can open instructions to receive virus signals, thus destroying the core content of the computer and achieving the purpose of stealing data. In the worst case, it can paralyze the whole computer. The second is the leakage of electromagnetic waves, because computers radiate powerful electromagnetic waves when they are used, and it is precisely because computers have this function when they are used that some lawless elements use this characteristic of computers to restore powerful electromagnetic waves, thus achieving the purpose of stealing information and data. The third is hardware damage, which is typically manifested as hardware damage and storage failure, or the data backup function of the computer itself cannot be used normally, resulting in the inability to use and store data. Although the computer itself has the reinforcement technology, the reinforcement technology still has certain limitations and cannot better protect the computer hardware.

2.2 Computer Network and Software Problems

With the popularization of computer networks, more and more people use computer networks, but there are also many problems in computer networks and software. Typical manifestations are: information is modified, identity is fraudulently used, information is stolen and destroyed, and so on. Its main manifestations are as follows: First, there are viruses in the computer, and some software comes with some viruses, which can steal users' data and delete important data from users' computers. Second, Trojan or backdoor Trojan virus, these seemingly legitimate programs actually cover up the facts with the surface, thus secretly stealing user information through informal means; Third, being eavesdropped means that users are obtained by criminals when transmitting information; Fourth, data and information are tampered with, and after the data stored by users are transmitted, criminals tamper with these data; Fifth, camouflage, some lawless elements wear the cloak of legitimate users and enter the program to steal information; Sixthly, interception service means that users are intercepted by criminals when transmitting data and information to the other party, and then the information is retrieved, which will lead to information loss and system termination. It can be seen that the threats to computer network security are various, and these ways of affecting security are more and more hidden, which requires us to pay attention to computer security issues and find some solutions to these security issues.

3 Strategies to solve computer security problems

3. 1 Master computer maintenance knowledge

To effectively protect computer security, computer users need to have some basic knowledge of computer security protection and be civilized computer users. In order to avoid computer security problems caused by improper operation of users and make computers play a greater role and serve people, we need to do the following: First, pay attention to the temperature of the computer when it is used, which is 10℃ to 35℃ under normal circumstances. Pay attention when using the computer in summer. Second, when not using the computer, turn off the power supply of the computer and unplug the power cord, so as to avoid burning the computer easily due to excessive current; Third, you can't use the computer in a strong electromagnetic wave environment for a long time to protect the computer security.

3.2 Implantation authentication technology

The purpose of implanting authentication technology into the computer is to verify the identity of the user who sends information and the identity of the user who receives information. This technology is mainly divided into two types: digital signature and digital certificate to avoid data tampering in information transmission. Therefore, this technology is implanted in the computer to improve the security of information transmission. Digital signature means that the identity can be confirmed when the hash values of the sender and the receiver are consistent. Another method is that both the sender and the receiver must pass the password provided by the authoritative certificate to enter the system to extract information.

3.3 Be good at using firewalls

Firewall is a protective wall between computer and network. Whether the computer sends or receives information, it must pass through the firewall. Firewall can scan information, exclude some information with viruses, and prevent some information from spreading on the computer, thus destroying other software and hardware on the computer and greatly protecting the security of the computer network. Therefore, users who use computers must install firewalls to protect computer security.

3.4 to protect computer hardware security

In order to ensure the normal operation of the computer, it is necessary to protect the security of the computer hardware. At present, the computer hardware market is chaotic, which requires consumers who choose computer hardware to choose hardware with higher cost performance. They really don't know how to choose. They can consult some computer professionals to ensure the quality of computer hardware and improve the safety and efficiency of computers.

4 conclusion

To sum up, the existence of computer security problems threatens the information of computer users, which will seriously cause irreparable losses. Therefore, we should attach importance to computer security protection, which requires all kinds of support and efforts to ensure computer security.

refer to

1, the challenge of computer network crime to criminal proceedings and the institutional response. Chen Yongsheng northwest university of politics and law Law Journal 20 14-05- 10.

2. The teaching reform trend of computer undergraduate major and its enlightenment-Also on the teaching reform experience of Computer Science and Technology College of Lu Feng Huazhong University of Science and Technology: Jinhai Higher Engineering Education Research 20 14-09-28

Fan Wener: Computer Network Radio and Television Multimedia Technology Abstract: In recent years, computer networks have developed rapidly, and people's lives have been inseparable from computer networks. People get more information from radio and television, which leads to the rapid development of radio and television multimedia technology based on computer network technology. The convenience of network technology has also prompted more people to like network broadcasting and network TV. This paper studies the application of computer network in radio and television multimedia.

Keywords: computer network; Radio and television development; multimedia instruction

With the development of computer technology in China, the Internet has become an indispensable source of information in people's lives. All walks of life are used to using network technology to work. With the increase of the number of people who own the network, people have more demand for network technology. Under this premise, network technology has developed to all aspects of society, so computer network technology has played a great role in the development of radio and television industry. And the integration of radio and television, radio and television has made great innovation and solved the radio and television project.

1 multimedia technology and the development of radio and television based on computer network

1. 1 The concept of radio and television multimedia technology based on computer network.

The multimedia technology of radio and television based on computer network can also be called network interactive television, which is a combination of internet technology, television media communication technology and communication technology. It can realize the function of interacting with TV viewers, and further optimize the operation and playing technology, which is more convenient. At present, many websites in our country use the technology of network TV, and there are also many platforms for watching network TV, such as mobile phones and TV set-top boxes. At present, the largest terminal of network TV in China is digital TV. Internet TV is the only way for the development of video communication in the future, and it is the result of the continuous integration of various technologies. It can provide personalized service for users according to their own needs. Personalized service refers to diversified and all-round customized services. Network broadcasting is a technology that has not been fully realized at present. At present, Internet TV is only an incomplete Internet TV, which can be called the "baby state" of Internet radio and television, but it is this state that is the only way for Internet TV to develop to a mature stage. In my opinion, Internet TV is not only a form of radio and television development, but also a new revolutionary achievement. It is an innovative product that combines many modern technologies, breaking the shackles of traditional one-way communication technology, giving people the right to speak, better promoting the development of TV programs, satisfying more people's tastes, and realizing the interactive two-way communication mode. It can be said that the two-way communication mode is the fundamental core of Internet TV, and the combination of Internet and broadcasting technology is a challenge.

1.2 Development of Radio and Television Based on Computer Network

With the development of computer technology, computer technology has played a positive role in promoting the development of radio and television industry. China has made good achievements in the development of radio and television technology based on computer network, which makes the combination of network and television broadcasting more diversified, simplified and informative, and can meet the needs of the general public to a greater extent. At present, many researchers and scholars in China have carried out research on the application of systematic testing computer network technology in radio and television, hoping to promote the development of this field. Now, with the accelerating pace of life and the reduction of entertainment time, people can easily miss many of their favorite TV programs in their lives, which may lead to the loss of viewers of many TV programs. Through the research of network technology, this matter can be better solved. It can break the TV programs that miss the broadcast time, make people relax better and attract more viewers. So far, China is stepping up relevant research to achieve early results.

2 Multimedia technology and application of radio and television based on computer network

2. 1 Application of computer technology and computer network engineering in TV media engineering

In the previously used radio and television media technology, audio and video signals convert all media contents into digital signals in transmission, which is called analog signals. This kind of analog signal is easily influenced by various external factors, such as electromagnetism. Therefore, there are usually bottlenecks in the transmission of traditional radio and television content, which restrict its development. Due to this factor, all the development of radio and television will not be updated in time, so that the public can not get good-looking programs. With the development of modern science and technology, converting previous signals into digital signals can not only ensure the security of transmission, but also ensure the quality of transmission. Therefore, computer technology has played a great role in the development of radio and television. With the help of modern scientific means, the traditional circuit communication network, broadcasting network and distribution mode are improved, and radio and television are further developed by network technology, which is of great significance to human production and life. It is a great innovation compared with radio and television, and provides a new platform for network users. The exchange of big data such as radio and television can be completed by using simple network data, thus increasing the number of network-related users. Now the traditional way of broadcasting and television has changed and is developing in the direction of innovation. Now it not only improves the quality, but also increases the transmission range, making radio and television more suitable for modern development.

2.2 Computer network technology collects TV program materials and controls the broadcast time and sequence of programs.

Using computer network technology, the network of TV stations can be interconnected with the Internet, so that TV programs can be enjoyed in a certain range, and the computers of TV stations can transmit at will, which can simplify the program playing sequence of TV stations, save recording time and improve the execution and playing quality of radio and TV programs. In addition, computer network technology can be used to save human resources in the work of TV stations and radio stations. Through the application of computer control, people in the background can be streamlined, and the effect will reach the same level as that of on-the-job personnel. It can also improve the program playing order and scientific arrangement, and can be played as expected at the end of the arrangement. At the same time, we can not only adjust the playing order, but also add current affairs programs and replace other programs, and ensure the normal playing of other programs under the above operation, and we can adjust programs with related problems.

2.3 Computer Network Technology Editing Radio Program Files

Through the computer network technology, the staff can download the required files to the computer, and use related technologies to intelligently sort and analyze them to achieve the desired effect, and then upload them to the network database of TV stations or radio stations for automatic background sorting and TV program synthesis, which greatly improves the working efficiency of the process. At the same time, computer network technology can be used to edit program files. Nowadays, many TV programs are sensitive to time, especially news programs and sports competitions. On this premise, the reporter interviews on the spot, and simply sorts out the interview materials and uploads them to the network database of the TV station. The staff will edit them and then insert the TV program at the first time.

2.4 Computer network technology can close the relationship with the masses.

In the process of broadcasting or TV programs, viewers can get the information they want through the Internet, which breaks the original restrictions on watching TV programs, can choose their favorite programs through the Internet, and can interact and communicate through the Internet, which can make TV program producers get good feedback and make better productions.

3 Conclusion

To sum up, the multimedia technology of radio and television based on computer network has been well developed, realizing high-speed and high-quality TV program transmission, saving more human resources by using network information, maximizing efficiency, enriching the forms of TV programs, and enabling viewers to better communicate with producers. However, the development of computer network in radio and television is not limited to these. I believe that the development of computer network in radio and television multimedia technology will have a better development in the future.

refer to

[1] Ding Jie. Development and trend of interactive network TV in China [D]. Nanning: Guangxi University, 20 13.

[2] Li Guoren. Radio and television education under the network environment [D]. Lanzhou: Northwest Normal University, 20 12.

[3] Di Bai Tao. Application of Computer Technology in Radio and Television Engineering [J]. Science and Technology Communication, 20 14.

[4] Wang Yongmin. Analysis on the application of multimedia computer technology in radio and television engineering [J]. Electronic production, 20 14, 1:55-56.