Confidentiality, also known as confidentiality, is the characteristic of not revealing useful information to unauthorized users. It can be realized by information encryption, identity authentication, access control, secure communication protocol and other technologies. Information encryption is the most basic means to prevent illegal disclosure of information, which mainly emphasizes the feature that useful information is only used by authorized objects.
2. Integrity.
It refers to the characteristic that information cannot be destroyed or modified, lost or changed without authorization during transmission, exchange, storage and processing, and it is also the most basic security feature.
3. Availability.
Also known as effectiveness, it refers to the characteristics that information resources can be accessed by authorized entities on demand, used normally or recovered under abnormal conditions (the security characteristics of the system serving users). Access the required information correctly when the system is running, and when the system is accidentally attacked or destroyed, it can be quickly restored and put into use. It is a measure of the user-oriented security performance of the network information system, so as to ensure the provision of services for users.
4. controllability.
Refers to the controllability of network system and information in transmission range and storage space. It is the characteristic of controlling network system and information transmission.
5. There is no denying it.
Also known as denial and undeniable, it means that both parties in network communication are convinced of the true identity of the participants and the information provided, that is, all participants can't deny or deny their true identity, as well as the authenticity of the information provided and the completed operations and commitments.
Expand the five basic functions of data information system: input, storage, processing, output and control.
Input function: The input function of an information system depends on the purpose of the system, the ability of the system and the permission of the information environment.
Storage function: Storage function refers to the system's ability to store various information and data.
Processing functions: on-line analytical processing (OLAP) and data mining (DM) based on data warehouse technology.
Output function: The various functions of the information system are ultimately to ensure the best output function.
Control function: control and manage all kinds of information processing equipment that constitute the system, and control the processing, processing, transmission and output of the whole information through various programs.
References:
Baidu encyclopedia-information system
References:
Baidu encyclopedia-information security