Anne V. D. M. Kayem Selim G. Akl Patrick Martin Adaptive Cryptographic Access Control 48 2010 1-135 Springer Advances in Information Security http://dx.doi.org/10.1007/978-1-4419-6655-1 http://dx.doi.org/10.1007/978-1-4419-6655-1 978-0-387-77265-3