This book presents the Proceedings of the Fourth Collaborative Research Symposium on Security, E-learning, Internet and Networking, hosted by the Centre for Applied Internet Research (CAIR) at Glynd_r University, Wrexham, UK, on the 6-7th November 2008. All authors are researchers from the Universities of Plymouth, Darmstadt and Glynd_r University in Wales. They are with one exception PhD students or postdoctoral researchers working in the presented areas. We hope this book can show new and interesting ideas for a wide audience especially for those who could not attend the Symposium.