Compared with traditional Internet, Internet of Things (IoT) has higher security needs. In the context of IoT, the basic management work will be handled by intelligent device software,so that people are free from redious low-level management,pouring more human and material resources into research of new technologies,resulting in huge economic and social benefits. However,once IoT is at stake or attacked,the loss will be immeasurable. Security is the premise of rapid development of IoT. On the basis of concept,structure and technology framework of IoT ,analyzed characteristics on IoT. Aiming at the characteristics of levels on IoT, analyzed the safety problems of perception layer,network layer and application layer,put forward relevant countermeasures for different security problems.%与传统的互联网相比,物联网具有更高的安全需求.在物联网环境下,基本的管理工作由智能设备软件去处理,使人们从繁琐的低层次管理中解脱出来,将更多的人力、物力投入到新技术的研发中,产生巨大的经济和社会效益.然而一旦物联网的安全受到威胁、遭到攻击,损失将是不可估量的.物联网的健康迅猛发展,安全保障是其重要的前提.通过对物联网的基本概念、结构框架、技术框架的阐述,分析了物联网的相关特征,针对物联网各层的特点,分析了感知层、网络层、应用层存在的安全问题,并提出了一些解决思路.
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