Yupapin and Pornsuwancharoen (photonics, King Mongkut's Institute of Technology Ladkraband, Thailand) detail an approach to security in wireless communication that they have developed. It involves a small device called a micro ring resonator planted within the mobile phone handset, and can be made smaller and smaller as the size of telephones decrease. They describe the linear performance of the resonator, its nonlinear aspects, and the emerging technologies. Annotation ©2009 Book News, Inc., Portland, OR (booknews.com)
