  The future of Internet of Things (IoT) is already upon us. IoT applications
have been widely used in many field of social production and social living such
as healthcare, energy and industrial automation. While enjoying the convenience
and efficiency that IoT brings to us, new threats from IoT also have emerged.
There are increasing research works to ease these threats, but many problems
remain open. To better understand the essential reasons of new threats and the
challenges in current research, this survey first proposes the concept of "IoT
features". Then, the security and privacy effects of eight IoT new features
were discussed including the threats they cause, existing solutions and
challenges yet to be solved. To help researchers follow the up-to-date works in
this field, this paper finally illustrates the developing trend of IoT security
research and reveals how IoT features affect existing security research by
investigating most existing research works related to IoT security from 2013 to
2017.

Cryptography and Security