This book discusses the problems of  Physical Layer Security (PLS) in Intelligent Reflecting Surface (IRS)-assisted wireless networks. It also discusses the corresponding methods to solve these problems in a comprehensive style.  Furthermore, some potential challenges are well analyzed. This book is divided into 11 chapters.  Chapter 1 introduces the propagation characteristics of IRS-aided PLS communications. From Chapter 2 to Chapter 10, The authors mainly provide deep investigations of different PLS problems of  IRS-aided wireless networks, namely, directional modulation (DM) networks. Chapter 11 draws a conclusion and includes the future research directions. Researchers working in wireless communications, or advanced-level computer science or electrical engineering students, can learn about secure communication in the physical layer through our book. Professionals or engineers working in this field will also benefit from this book.

Towering skyscrapers, manned space flights, the Olympics...From some angles, the new China is a country of dreams fulfilled, of glory and pride. But with new pleasures come new desires, new utopias to imagine just around the bend. These "Fancy Dreams" from 10 young artists ask, "What next?" The collective work, which recently showed in Beijing, merges into a multicolored playground: installations, videos, photographs and traditional forms entwine so that the barriers and the borders among them melt away. The spectator finds himself at a fun fair or an amusement park, where art becomes a relief from its own political questions, an aesthetic pleasure as much as an intriguing set of ideas.