This book investigates the security and privacy issues in mobile healthcare management and develops solutions based on Mobile Web services and XML security technologies. Web services can be extended to develop services for the applications in mobile hand-held devices that are connected to a mobile network. Transferring healthcare services to electronic and mobile environment is one of the emerging research areas in healthcare as solutions to the present overstretched and under budgeted healthcare services. This approach will transfer patient medical records and services on wired and over the air techniques between patients and healthcare services. So patients and healthcare service providers have remote access to medical records and medical services over the Internet or mobile network. Mobile healthcare environment transfer patient life sensitive medical records between different actors in the environment. There are a number of possible external security attacks on the system during the data storage and transmission. Therefore, protecting the mobile healthcare Web services environment from security and privacy attacks is one of the emerging research areas.