Abstract. In an identity based encryption scheme, each user is identified by a unique identity string. An attribute based encryption scheme (ABE), in contrast, is a scheme in whic...
Role-Based Access Control (RBAC) is increasingly used for ensuring security and privacy in complex organizations such as healthcare institutions. In RBAC, access permissions are g...
This paper describes a general methodology for automated recognition of complex human activities. The methodology uses a context-free grammar (CFG) based representation scheme to ...
Biometric systems identify users based on behavioral or physiological characteristics. The advantages of such systems over traditional authentication methods such as passwords are...
As privacy becomes a major concern for both consumers and enterprises, many research efforts have been devoted to the development of privacy protecting technology. We recently pr...