The network security handwritten newspaper is simple and beautiful, first prize

3. Anti-repudiation issue

Anti-repudiation refers to how to prevent the information source user from not acknowledging the information he or she has sent, or from the user not acknowledging the information after accepting it. Methods such as identity authentication, digital signatures, digital envelopes, and third-party confirmation are needed to ensure the legality of network information transmission and prevent the occurrence of repudiation.

4. Internal network security precautions

We sometimes hear news like this: customer information of a certain company was leaked, and it was found that it was caused by back-end theft by a resigned employee of the company. Security within the network refers to how to prevent users with legitimate identities from intentionally or unintentionally leaking behaviors that are harmful to network and information security. To solve the insecurity factors within the network, we must start from two aspects: on the one hand, monitor the network operating status and user working status at any time through network management software, and record and audit the usage status of extremely important network resources (hosts, databases, disks, etc.) ; The two aspects are to specify and improve the network use and management system, and strengthen user training and management.

5. Network anti-virus

Current viruses can be roughly divided into 6 categories: boot viruses, executable file viruses, macro viruses, hybrid viruses, Trojan viruses and Internet language viruses . Network anti-virus needs to be solved from two aspects: anti-virus technology and user management.

6. Network data backup and disaster recovery

No matter how powerful an enterprise is, it is impossible to avoid network disasters, some of which are considered to be avoidable disasters (such as administrator errors and accidental deletion of data) , some are unavoidable disasters, such as unexpected power outages and line damage. Alipay and WeChat also experienced several outages last year. Therefore, network data backup and disaster recovery are extremely important.

In the actual network operating environment, data backup and recovery functions are very important. Although they can be avoided from a preventive perspective, it is impossible to completely guarantee that the system will not go wrong.

Network security knowledge: the nature of the network

Network security knowledge: the nature of the network: Computer networks did not appear with the emergence of computers, but with the society's demand for resources. Developed out of the urgent need for sharing, information exchange and timely delivery. It is the product of the close combination of modern computer technology and communication technology. To be more precise, a computer network is a system that uses communication equipment and communication lines to connect computers and other equipment that are not together, and uses corresponding software to realize resource sharing and information exchange.

The early network only meant that several computers in a unit were connected together with a cable to achieve local resource sharing and information exchange. Today's network connects tens of millions of computers in hundreds of countries in the world, forming a giant spider-web-like "monster" to realize all-round resource sharing around the world. and information exchange. This is the Internet, also known as the International Internet. For an organization, as long as you connect the external connection of the organization's network to the Internet, the nature of your network will fundamentally change, and its extension and connotation will undergo fundamental changes. The network we are talking about today refers to the Internet, and the "online" thing is also the Internet. What are the benefits of network security knowledge?

What are the benefits of network security knowledge: This benefit is actually reflected in the two aspects of resource sharing and information exchange and timely delivery. Take resource sharing as an example. An office or several offices only installs one printer without delaying work; a company or library only purchases an expensive piece of software, and everyone in the company can use it at will; a train Stations or airline ticket offices collect ticket information and put it online. Anyone can check it online at any time to know how many tickets are available for a certain train or flight. Such things as saving money and reducing duplication of work are all benefits. The benefits of information exchange and timely transmission of information in the network are even greater. Because of the computer network, the People's Daily can send the layout to printing sites all over China and even abroad within a few minutes after finishing printing in Beijing. In this way, you can start printing from the newspaper at around 6 o'clock in the morning. The Internet knows the news that happened half an hour before the newspaper was printed; also because of the Internet, farmers in Huadu can sell flowers to countries all over the world from their homes. Children in Shaoguan can attend the online school of the High School Affiliated to Guangzhou Normal University while sitting at home and receive extracurricular tutoring from special teachers across the country.

It can be said that it is precisely because long-distance information exchange and timely transmission can be carried out through the network. In this sense, the network has changed time and space, the distance between people has become closer, the earth has become smaller, and information has become smaller. Much more.