With a rapid development of information technologies including big data,cloud computing,Internet of things,etc.,the threats in cyber space also become more ubiquitous and complex.Moreover,more and more persis-tence and hidden features present in all kinds of network attacks.Threat intelligence based network defense can analyze the undergoing attacks and predict the threat situation in the future.Furthermore,based on the potential risk,users can define efficient security policy,thus the defense capabilities of the cyber space could be enhanced system-atically.Threat intelligence is a very wide research area.The research works and developments of the sensing,shar-ing and analysis for threat intelligence were studied and reviewed deeply.
