Sciweavers

2960 search results - page 390 / 592
» The Culture Based Model: Constructing a Model of Culture
Sort
View
ACSAC
2008
IEEE
16 years 1 months ago
The Role Hierarchy Mining Problem: Discovery of Optimal Role Hierarchies
Role hierarchies are fundamental to the role based access control (RBAC) model. The notion of role hierarchy is a well understood concept that allows senior roles to inherit the p...
Qi Guo, Jaideep Vaidya, Vijayalakshmi Atluri
DANCE
2002
IEEE
15 years 11 months ago
Developing Dynamic Security Policies
In this paper we define and provide a general construction for a class of policies we call dynamic policies. In most existing systems, policies are implemented and enforced by ch...
Prasad Naldurg, Roy H. Campbell, M. Dennis Mickuna...
ASIACRYPT
2001
Springer
15 years 11 months ago
Threshold Cryptosystems Secure against Chosen-Ciphertext Attacks
Abstract. Semantic security against chosen-ciphertext attacks (INDCCA) is widely believed as the correct security level for public-key encryption scheme. On the other hand, it is o...
Pierre-Alain Fouque, David Pointcheval
JCP
2007
214views more  JCP 2007»
15 years 6 months ago
Reconstruction of 3D Human Facial Images Using Partial Differential Equations
—One of the challenging problems in geometric modeling and computer graphics is the construction of realistic human facial geometry. Such geometry are essential for a wide range ...
Eyad Elyan, Hassan Ugail
DBPL
1993
Springer
141views Database» more  DBPL 1993»
15 years 10 months ago
Some Properties of Query Languages for Bags
In this paper we study the expressive power of query languages for nested bags. We de ne the ambient bag language by generalizing the constructs of the relational language of Brea...
Leonid Libkin, Limsoon Wong