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Abstract: Discussing factors affecting computer network information security and formulating effective measures based on them have an immeasurable positive impact on the normal development of universities. Based on this, this article analyzes factors affecting computer network information security from three aspects: computer viruses, Trojans, and user errors. On this basis, three effective strategies are proposed: strengthening the application of encryption technology, strengthening the application of firewall technology, and enhancing users' safety awareness. It is hoped that these strategies can provide some insights to relevant personnel, enabling them to apply them in practical work, effectively enhancing computer network information security, and providing a good security foundation for the normal operation of universities.

Keywords: Computer; Network information security; Protective strategies; Research and analysis

The continuous updating of scientific technology has already made computer networks integrate into every aspect of people's lives. In this context, using computers has become an indispensable lifestyle for people. For universities, if they were to lose their networks and computers, maintaining daily operations would be incredibly difficult. The problem is that while computer network technology provides convenience to university operations, there are also drawbacks in certain areas, such as information security issues. If improperly handled, this may lead to the leakage of large amounts of information, ultimately causing irreparable harm to universities. Therefore, constructing an efficient and secure computer network information system to ensure that important university information will not leak is an important and long-term matter, requiring relevant personnel to raise attention.

1 Factors affecting computer network information security

The security of computer network information has always been a matter of major concern for universities. To achieve this goal, relevant personnel have continuously explored this area, thoroughly analyzing the elements that affect computer network information, and using this knowledge to formulate coping strategies to lessen the negative effects of undesirable elements on the computer network, thus ensuring the security of computer network information. Compared to the past, the security of computer network information has significantly improved, but currently, it still cannot meet the needs of the era. Therefore, relevant personnel must deeply realize the importance of their work. In specific work, they should actively explore effective countermeasures to improve computer network information security to the greatest extent, so as to provide good conditions for the sustainable development of universities, creating a favorable environment for their daily operations [1].

1.1 Computer virus intrusion

Some people choose to use computer viruses to achieve their undisclosed goals. These computer viruses usually possess high concealment. If universities do not have strong protective measures, they are easily subject to virus intrusion, ultimately affecting daily university operations. Some computer viruses, once entering the university system, will be directly activated, releasing viruses that paralyze the university's computer systems, thereby affecting normal university operations. Other viruses, upon entering the university system, will not act immediately but will choose to lie dormant for a period before being activated at certain times, threatening the safety of computer systems. Furthermore, viruses are highly destructive. Whether it is a computer virus activated immediately or one activated after a period of dormancy, they will cause relatively large infections to the entire computer system, affecting its normal operation and rendering it ineffective. Finally, highly infectious computer viruses, once entering a university system, will cause damage to all files on the computer in a relatively short time, and in the process, they will massively reproduce and spread. Sometimes, even using relatively strong antivirus software cannot mitigate the damage caused by viruses. In such cases, file destruction or deletion on computers becomes a relatively common phenomenon. If left unchecked, it will certainly affect the daily operations of universities. Therefore, effective measures must be taken for scientific prevention [2].

1.2 Trojan intrusion

In certain respects, Trojans are similar to computer viruses. They refer to codes hidden within normal programs that can cause varying degrees of damage to computers. Typically, Trojans hide in graphic software or games. If not specifically trained, ordinary people find it difficult to detect them. In other words, users will assume this is a good program and start using it, while the Trojan contained within the program attacks the computer system, resulting in file corruption and deletion. Some Trojan viruses may even cause the computer hard drive to be formatted, erasing all stored files. Most importantly, these Trojans may steal important content from within the computer, causing immeasurable harm to the daily operations of universities [3].

1.3 User errors

Whether it is computer viruses or Trojan programs, universities are very aware of their hazards. Therefore, in daily use of computer network systems, certain security measures are set up to reduce the influence and threats of undesirable factors on computer network information security, ensuring the effective conduct of daily university activities. This approach is good; however, during use, some computer operators lack the knowledge to prevent computer virus intrusion and often make errors, threatening system security. The most common errors include the following: First, inability to recognize problematic websites. Some lawbreakers disguise well-known websites using various means to reduce users' guard. Professional computer personnel can naturally see through disguises, thereby taking effective avoidance measures to protect the safety of the entire computer network system. However, not all users have superior preventive skills, so some users cannot differentiate between true and false, logging into disguised websites, causing certain losses, and affecting daily university operations [4]. Second, inability to identify toxic emails. Some lawbreakers register many emails and then send mails, requesting recipients to reply according to the requirements in the mails. Some users click "reply," not knowing there's deception involved, which eventually leads to personal information leaks. Lastly, the network environment is relatively chaotic. Merchants, for profit, post advertisements on many websites. Some lawbreakers take advantage of this, hiding viruses or Trojans in the advertisements. Once users are not cautious and click on these ads, their computer systems face security threats.

2 Effective protective strategies to enhance computer network security

2.1 Strengthening the application of encryption technology

In recent years, to ensure the security of computer network information, relevant personnel have developed many encryption technologies in an effort to reduce the harm caused by computer viruses or trojans through such means. Universities can strengthen the application of these encryption technologies in their daily operations to reduce the threat of adverse factors to computer network security. Firstly, encrypt the network database through advanced technology. Currently, many universities lack emphasis on network databases and often set them at lower levels during configuration, which leaves computer network information security vulnerable to malicious attacks by lawbreakers. To change this situation, the databases need to be encrypted so that the corresponding access permissions are strictly restricted, thereby protecting the security of confidential information[5]. Secondly, encrypt important software. Some antivirus software may cause the computer to be infected by viruses during operation, resulting in varying degrees of harm to the entire computer system. Therefore, when encrypting data, it is necessary to scientifically check relatively confidential data files to see if they are infected with viruses from antivirus software. If so, immediately take effective measures to eliminate the viruses. At the same time, when encrypting data, it is also necessary to encrypt antivirus software to prevent it from becoming a tool carrying viruses, which could cause immeasurable damage to the computer system. Finally, scientifically encrypt the VPN. Many universities or enterprises use dedicated simulation networks to improve office efficiency, enabling data sharing within the scope of the enterprise or university network. Some cross-region enterprises may establish wide area networks to achieve this goal. Regardless of the type of network, computer network information security should be its most important aspect. To achieve this, universities or enterprises that construct computer network information can complete the objective of network information security protection by controlling router access, and during information transmission, scientifically encrypt keys to increase data security, ensuring the computer network security system is not invaded or destroyed[5].

2.2 Strengthening the Application of Firewall Technology

Firewall technology is a protective technology to safeguard computer network security, helping users effectively resist some illegal user accesses and reduce the probability of adverse factor occurrences. Currently, as computer virus intrusion technology continues to improve, relevant personnel have not stopped updating firewall technology. Some firewall technologies can effectively prevent the intrusion of hackers and computer viruses and other adverse factors, ensuring the privacy of universities and individuals. At the same time, they can issue prominent warnings to staff, prompting them to strengthen the construction of network information security systems, to effectively avoid the leakage of important information, which could cause irreparable negative impacts on universities. Universities can fully apply this technology to the daily computer network information security protection system, using advanced scientific technology to minimize the negative impact of adverse factors on network information security, thus ensuring the orderly conduct of various activities in universities[6].

2.3 Strengthen Users' Security Awareness

Users' improper operations when using computers may also lead to the leakage of network information, causing immeasurable negative impacts on universities. This situation results partly from the insufficient security awareness of users. Some users lack adequate understanding of computer viruses and other adverse factors, and can easily overlook the risks hidden in computers during use, leading to clicking on popup windows and ultimately causing the computer to be infected by viruses. On the other hand, it is due to users' insufficient skills in protecting against computer viruses. Some users, although having some understanding of the harmfulness of computer viruses, also pay repeated attention to preventing viruses during use. However, due to low protection skills, they are not able to timely detect the modes of virus invasion, which causes varying degrees of harm to computer networks. In response, relevant personnel should take various effective measures to both strengthen users' security awareness, allowing them to truly realize the harm of computer viruses and maintain high vigilance, and to improve their capability to fend off virus invasions, allowing them to take effective measures to minimize negative impacts when their computers are invaded by viruses[7].

3 Conclusion

In summary, the leakage of computer network information can greatly impact the normal operations of universities. Thus, relevant personnel must give it high importance and actively adopt effective measures to minimize the impact of adverse factors on computer network information security.

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Abstract: With the continuous development of computer simulation technology, it has been widely applied in the medical field. Computer simulation technology can create various models of medical significance, which are significant for promoting medical development. The integration of modern computer technology and medicine has become a trend. This paper mainly introduces the integration and development research of computer simulation technology and medical testing technology.

Keywords: Computer; Simulation Technology; Medical Testing; Fusion

0 Introduction

When analyzing systems, based on similarity theory, using computers to simulate the objects is computer simulation technology. The research object can be divided into imagined and really existing systems. With the rapid development of computer technology, its application in the medical field is increasing. There have always been outdated conceptions of medical technology, thinking that computer technology cannot be combined with medical technology, but with the emergence of computer simulation technology, these thoughts have been shattered, and medical development has welcomed new opportunities and challenges.

1 Introduction to Computer Simulation Technology

1.1 Overview of Computer Simulation Technology

Computer simulation technology is based on several theories and disciplines, using computers and related application systems as important tools, employing experimental simulation to solve related problems and is a typical comprehensive technology. Computer simulation was initially called the Monte Carlo method, specifically using random number experiments to solve random problems. Its realization mechanism can be traced back to 1773 when G.L.L.Buffon conducted physical experiments to estimate pi. According to the different types of computers used in simulation technology, the development history of computer simulation technology mainly involves three key stages: analog computers, hybrid analog-digital computers, and digital computers[1].

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