As is common practice in research, many new cryptographic techniques have been developed to tackle either a theoretical question or to forsee a soon-to-become reality application. In the area of cloud computing, cryptography is expected to unveil its power by bringing striking new features to the cloud. Cloud computing is an evolving paradigm whose basic function is to shift computing and storage capabilities to external service providers. This resource offers an overview of the possibilities of cryptography for protecting data and identity information, much beyond well-known cryptographic primitives such as encryption or digital signatures. This book represents a compilation of various recent cryptographic primitives, providing readers with the features and limitations of each.