A highly respected clinician and researcher, Dr. Trull examines the rigorous research training that clinicians receive, along with the empirically supported assessment methods and interventions that clinical psychologists must understand to be successful in the field. This new edition of Trull's best-selling text covers cutting-edge trends, and offers enhanced coverage of culture, gender and diversity, and contemporary issues of health care. Written to inspire students thinking of pursuing careers in the field of clinical psychology, this text is a complete introduction.

    This best-selling text has been updated with new examples, guidelines, insights, and ideas that demonstrate how group leaders can apply the basic issues and key concepts of the group process to a variety of groups. Offering up-to-date coverage of both the "what is" and the 'how to' of group counseling, the Seventh Edition features a greater focus on group work with children, the elderly, issues in both women's and men's groups and in school settings.

    … The book the National Security Agency wanted never to be published." –Wired Magazine "…monumental… fascinating… comprehensive… the definitive work on cryptography for computer programmers…" –Dr. Dobb's Journal"…easily ranks as one of the most authoritative in its field." —PC Magazine"…the bible of code hackers." –The Millennium Whole Earth CatalogThis new edition of the cryptography classic provides you with a comprehensive survey of modern cryptography. The book details how programmers and electronic communications professionals can use cryptography—the technique of enciphering and deciphering messages-to maintain the privacy of computer data. It describes dozens of cryptography algorithms, gives practical advice on how to implement them into cryptographic software, and shows how they can be used to solve security problems. Covering the latest developments in practical cryptographic techniques, this new edition shows programmers who design computer applications, networks, and storage systems how they can build security into their software and systems. What's new in the Second Edition? * New information on the Clipper Chip, including ways to defeat the key escrow mechanism * New encryption algorithms, including algorithms from the former Soviet Union and South Africa, and the RC4 stream cipher * The latest protocols for digital signatures, authentication, secure elections, digital cash, and more * More detailed information on key management and cryptographic implementations

    "More concretely," the authors explain, "it is the controlled manipulation of mathematical formulas, using a collection of techniques for solving problems."