But whether users understand how and why they are truly authentic, the security level of authentication mechanism they use, and potential impacts of selecting one authentication mechanism or another? Introducing key concepts, Mechanics User Identification and Authentication: Fundamentals of Identity Management outlines the process of controlled access to resources through authentication, authorization, and accounting in a way, in-depth yet accessible. The book then describes the process of controlled access to the resources and discuss the type of mandate that the user can be presented as proof of identity before accessing a computer system. It also contains an overview of cryptography, which includes an important approach and terminology necessary for understanding how user authentication works. This book provides detailed information about user authentication process for both UNIX and Windows.