One of the most important tasks in developing a Network node is to make sure it is secure. Web services is a powerful and flexible technology for exchanging information on the Internet, but it has some of the same security risks and requirements that all web-based applications have. Our experience shows that developing a security subsystem for a Network node requires more than 50% of total project resources. By using NAAS, you can leverage your resources and focus on node-specific functions, like mapping your data to schemas. The CDX and Exchange Network technical team strongly advise all node builders to take advantage of the NAAS, because it is free, it is a proven solution, and will make your node capable of much greater functionality, including such features as single sign-on. The NAAS will also greatly simplify the process of upgrading Node Security as needed and will in many cases require node builders to make little or no modifications themselves.