  Internet-of-Everything (IoE) has gradually been recognized as an integral
part of future wireless networks. In IoE, there can be an ultra-massive number
of smart devices of various types to be served, imposing multi-dimensional
requirements on wireless communication, sensing, and security. In this article,
we provide a tutorial overview of the promising intelligent reflection
communication (IRC) technologies, including reconfigurable intelligent surface
(RIS) and ambient backscatter communication (AmBC), to support the requirements
of IoE applications beyond the fifth-generation (5G) wireless communication
network. Specifically, we elaborate on the benefits of IRC-assisted IoE in the
context of the space-air-ground integrated communications and green
communications, which are regarded as key features of supporting future IoE
application from society and industries. Furthermore, we envision that the
IRC-assisted communication and sensing can mutually benefit each other and
articulate multiple ways of enhancing the security in IoE by the IRC. Numerical
results help illustrate the importance of the IRC in unfavorable secrecy
environments. Finally, open research issues and challenges about the
IRC-assisted IoE are presented.
