This work also investigates common security
architecture problems. Section 2 presents an analysis of
the current research status of the security architecture.
Section 3 examines the security threats occurring in the
perceptual, network, middleware, and application
layers. A more refined security principle and twodimensional
(2D) security architecture for the IoT are
presented in Section 4. Finally, Section 5 states the
conclusion of the paper.