CANNY, J. Protecting user data in ubiquitous computing environments : Towards trustworthy environments. Privacy-Enhancing Technologies (PET) 2004, Toronto, Canada, May. 2004, 167-185
YOKOYAMA, S. An Anonymous Context Aware Access Control Architecture. Proc. Intl. Workshop on Managing Context Information and Semantics in Mobile Environments (MCISME), Nara, Japan, May 2006. 2006