Today's healthcare computer systems rely upon a disparate collection of legacy services, all developed separately and independently for patient records, radiological images, scheduling, billing, and administration. The Web is based on a client-server model. It consists of a set of servers, known as Web servers, which receive one request at a time and respond to that request without preserving state information, and a set of clients, known as Web browsers, which make requests based on user input and present results. Several efforts have been undertaken to address security in the Web, although the primary focus has been at the application level. These efforts have addressed the issue of protecting the privacy, accuracy and authenticity of transactions conducted over the Internet. In this work we will discuss cutting edge security tools in Microsoft’s newest .NET framework version, how to use and witch to choose, how to integrate them in medical environment, will see how they meet today’s medical web services requirements and will propose some methods to make securing of web services easier and more reliable.