Undeniability, also known as undeniability, means that the sender of information can't deny the information that has been sent or part of it, and the receiver of information can't deny the information that has been received or part of it. The measures to realize non-repudiation mainly include digital signature and trusted third-party authentication technology.

realness

Authenticability refers to ensuring that both information users and information service providers are true declarers and preventing counterfeiting and replay attacks.

controllability

Controllability refers to the authentication, authorization, monitoring and management of information and information systems to ensure the authenticity of an entity (users, processes, etc.). ), to ensure the security and legality of the information content, and to ensure that the system state can be controlled by the authorized party.

Examination ability

Auditability refers to the use of security mechanisms such as auditing, monitoring and rejection prevention, so that the behaviors of users (including legitimate users, attackers, saboteurs and deniers) can be recorded, providing basis and means for investigating security problems in the network.

Availability means that legal users can access information resources and use them according to the required characteristics without being denied service.

In order to achieve availability, many security measures can be taken, such as backup and disaster recovery.

The principle of availability is that the server should provide resources (information) to the licensor at any time, and the interruption will destroy the availability.