Abstract
Along with the rapid development and wide application of information technology, human society is entering the information era. In this era, people live and work in cyberspace, which is a collection of all infor-mation systems, and the information environment for human survival. Therefore, ensuring cyberspace security is necessary. This paper provides a comprehensive introduction to the research and development, existing prob-lems, and some popular research topics on the cyberspace concept, cyberspace security discipline, cryptography, network security, information system security, and information content security.
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