"Selected Areas in Cryptography" is a technical book that presents the results of the 16th Workshop on Selected Topics in Cryptography, which took place in 2009 at the University of Calgary. The book includes contributions from 74 participants from 19 countries and covers a wide range of topics relevant to modern cryptography. The topics discussed range from the design and analysis of symmetric key primitives and cryptosystems to efficient implementations of algorithms and the mathematical and algorithmic aspects of applied cryptology. Additionally, a special topic on enhancing privacy through cryptographic systems is addressed. This book is a valuable resource for professionals and students looking to engage with the latest developments and challenges in cryptography.