Wireless communication systems are, by now, very popular all over the world. In some countries, like Japan and South Korea, the number of subscribers of cellular systems has passed that of public switched telephone. While wireless communication systems are very convenient for the user, their widespread use creates new challenges from a security point of view. It is physically far easier for an eaves-dropper to intercept and illegitimately manipulate information if it is transmitted over the air rather than inside an optical fiber, for instance. Therefore, securing wireless systems has been a very active field both inside industry and academia.

In this book, we introduce recent developments in the field of wireless security. One of the distinguishing features of our work is that it is written from a cryptographic point of view (i.e., we mainly focus on the cryptographic solutions being available in the wireless environment and standards). Throughout this book, we explain what functionalities are provided with each cryptographic module and/or function, why and how they should be used, what level of resistance can be achieved with what size of parameters, and so on. As it is not rare that cryptographic modules and functions are used in improper ways, we believe our book is a valuable resource for technicians, engineers, and professionals working in the field of wireless communications. We require no previous knowledge of cryptography and all the concepts used through the book are explained in a nontechnical but precise way.

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