  Internet of Things (IoT) is one of the emerging technologies of this century
and its various aspects, such as the Infrastructure, Security, Architecture and
Privacy, play an important role in shaping the future of the digitalised world.
Internet of Things devices are connected through sensors which have significant
impacts on the data and its security. In this research, we used IoT five
layered architecture of the Internet of Things to address the security and
private issues of IoT enabled services and applications. Furthermore, a
detailed survey on Internet of Things infrastructure, architecture, security,
and privacy of the heterogeneous objects were presented. The paper identifies
the major challenge in the field of IoT; one of them is to secure the data
while accessing the objects through sensing machines. This research advocates
the importance of securing the IoT ecosystem at each layer resulting in an
enhanced overall security of the connected devices as well as the data
generated. Thus, this paper put forwards a security model to be utilised by the
researchers, manufacturers and developers of IoT devices, applications and
services.
