Appreciate if you can suggest a title or area which is worthwhile ??? ok. What are the best / possible areas in security ??? What are the possible research topics ??? etc...
It will be best for you to come up with your own title. In order to create a title, you really need to study a bit and first identify what you will research. It will be very difficult for you to create a title, if you do not know what the research will be based on.
It's not about researching the "best" areas, it is about researching the "important" areas of security and web services.
First, you should learn what "web services" are and then learn the various types of "web services" that can exist. Don't focus too much on how to implement them, just learn the high-level differences between different types of services. Learn what service granularity and service orchestration are. Learn the differences between a service-oriented architecture and a web service. Then ...
In terms of security, there are a bunch of standards to learn about, e.g. WS-Security, XML Encryption, XML Addressing, JAX-WS. Security is implemented with
SOAP extensions and handlers. Security is very important to implementing web services properly.
Remember this, web services are about integration not implementation.
Goob reference material below:
Service-Oriented Architecture (SOA) Compass Published by IBM Press
Enterprise SOA
Service-Oriented Architecture Best Practices Published by Prentice Hall
Good luck!
[ October 16, 2008: Message edited by: James Clark ]