With the continuous development of computer network, global informationization has become a major trend in the development process of human. However, due to the diverse link forms and uneven terminal distribution of computer network and the openness and connectivity of network, network has always been attacked by hackers, crackers, malware, and so on. Therefore, the security and confidentiality of information on the internet become quite significant. In fact, there are many natural and man-made network security threats in both LAN or WAN. This is why network security protection strategies are supposed to take effect in all aspects and why we offer users some common strategies. Only in this way, can the confidentiality, integrity and availability of network information be greatly ensured.
Network security threats
As a matter of fact, many factors can affect computer network. Some of them may be intentional or unintentional; some of them may be man-made or non-artificial; some of them may even be the illegal use of network resources by hackers. In conclusion, there are mainly three types of network security threats.
1. Unintentional error: operators’ improper security configuration, users’ weak security awareness and users’ careless choice of password are all included in unintentional human error. In addition, if users lend their account to others or share it with others optionally, they will also pose threat to computer network.
2. Malicious attack: malicious attack is one of the biggest network security threats. Both opponents’ attack and computer crime belong to this category. Malicious attack can be divided again into the following two types: active attack and passive attack. Active attacks are used to destroy the validity and integrity of information selectively through various ways. Passive attacks are used to intercept, steal and decode important confidential information without affecting the normal operation of network. Both active attack and passive attack can cause great harm to computer network and lead to confidential data leakage.
3. Bugs and “back door” of network software: there is no network software which has no defect and bug. Because of that, these defects and bugs hidden in network software become the main target of hackers. Most network invasion incidents are caused by incomplete security measures. In addition, the “back door” of software is actually designed by software company programmers for their own sake. The “back door” of software is generally not known to outsiders, but once it is discovered, disastrous consequences will be brought.
After knowing above network security threats, lots of users still don’t know how to protect network information and data. In view of this, we’d like to provide users with some common strategies.
- Physical security protection: The purpose of physical security protection is to prevent computer systems, network servers, printers, and so on hardware entities and communication links from being attacked by natural disasters, man-made damages, etc.
- Access control: access control is one of the common strategies to ensure network security and its main purpose is to avoid illegal access and use of network resources.
- Information encryption: the purpose of information encryption is to protect data, files, passwords and control information within the network and data transmitted over the internet.
- Network security management: besides above strategies, it is also necessary to strengthen network security management and formulate relevant rules and regulations.