  This article provides a survey on what can be called post-quantum IoT systems
(IoT systems protected from the currently known quantum computing attacks): the
main post-quantum cryptosystems and initiatives are reviewed, the most relevant
IoT architectures and challenges are analyzed, and the expected future trends
are indicated. Thus, this paper is aimed at providing a wide view of
post-quantum IoT security and give useful guidelines to the future post-quantum
IoT developers.
