摘要:With the development of the wireless communication technology and the improvement of the performance of the MEMS sensor, wireless sensor networks are widely used in various application scenarios such as smart building, intelligent transportation, ubiquitous and unobtrusive health monitoring system, etc. As information communicated among these networks is usually of privacy, so security in wireless sensor networks is of particular importance, and sensitive information must be protected from unauthorized usage for personal advantages and fraudulent acts. While, due to the extremely stringent constraints of energy, memory and computation ability, securing the communication among the sensors has posed various challenges to researchers. And at present, studies toward completely secure sensor networks are still in their infancy stages. In this paper, we explained the basic conceptions and the essential knowledge in the area of wireless senor network; and then we introduced and classified the common security attacks designed to demolish the wireless sensor networks, and the corresponding countermeasures against these issues are followed; examples of security problems in the application of health monitoring field are specially presented in the last section; and finally, we summarized the paper and imagined the possible future development of the security problems of the wireless sensor networks. I hope through this paper, one can learn the recent development of the attack and securing technology in the wireless sensor network and then develop more advanced anti-attack methods