Abstract :
With the rapid development of the information industry and the widespread use of information technology, information security has become a major concern in our society. In the information society, in addition to being a part of human society and the physical world, all persons are considered to belong to the information space. It is generally accepted that safety and reliability in human society are closely related to the security and trust associated with the information space. To ensure a safe, harmonious, prosperous and progressive human society, we must ensure that there exist security and trust in both the human society and information space simultaneously.
