What is information security? Does it matter?

Information security itself covers a wide range. It is as big as national military and political secrets, and as small as preventing the secrets of commercial enterprises from leaking, preventing teenagers from browsing bad information and revealing personal information. The information security system under the network environment is the key to ensure information security, including computer security operating system, various security protocols, security mechanisms (digital signature, information authentication, data encryption, etc. ), even the security system, any one of which may threaten global security. Information security service should at least include the basic theory supporting information network security service and the network security service architecture based on the new generation information network architecture.

meaning

Actively promote information security level protection.

As a resource, information is of great significance to human beings because of its universality, enjoyment, value-added, treatability and versatility. The essence of information security is to protect the information resources in the information system or information network from all kinds of threats, interference and destruction, that is, to ensure the security of information. According to the definition of the International Organization for Standardization, the meaning of information security mainly refers to the integrity, availability, confidentiality and reliability of information. Information security is a problem that any country, government, department and industry must attach great importance to, and it is a national security strategy that cannot be ignored. However, for different departments and industries, their requirements and priorities for information security are different. China's reform and opening up has brought about a sharp increase in all aspects of information, which requires large-capacity and efficient transmission. In order to adapt to this situation, communication technology has experienced an unprecedented explosive development. At present, in addition to wired communication, short wave, ultrashort wave, microwave, satellite and other radio communications are also being more and more widely used. At the same time, in order to steal the secret information of China's politics, military affairs, economy, science and technology, foreign hostile forces use reconnaissance stations, reconnaissance ships, reconnaissance planes, satellites and other means to form a three-dimensional reconnaissance network that combines fixed and mobile, long distance and short distance, air and ground, and intercept the information in China's communication transmission. Understanding the inside story of a society from literature has long been commonplace. In the last 50 years of the 20th century, it became easier and easier to know the inside story of a society from the computers to which it belongs. Organizations and individuals are implementing information security strategies.

More and more things are entrusted to computers, sensitive information is being transmitted between computer systems through fragile communication lines, special information is stored in computers or transmitted between computers, electronic banking enables financial accounts to be consulted through communication lines, law enforcement agencies learn criminal records from computers, and doctors use computers to manage medical records. Of all these, the most important problem is that information cannot be transmitted without taking measures to prevent illegal (unauthorized) access. There are many ways to transmit information, including local computer network, Internet and distributed database, cellular wireless, packet-switched wireless, satellite video conference, email and other transmission technologies. In the process of information storage, processing and exchange, there is the possibility of disclosure or interception, eavesdropping, tampering and forgery. It is not difficult to see that a single security measure can hardly guarantee the security of communication and information. All kinds of security measures must be comprehensively used, that is, through technical, management and administrative means, to protect sources, signals and information, so as to achieve the purpose of secret information security.