A time-bound hierarchical key assignment scheme is a method to assign time-dependent
encryption keys to a set of classes in a partially ordered hierarchy, in such a way that the key …

A key assignment scheme is a cryptographic technique for implementing an information flow
policy, sometimes known as hierarchical access control. All the research to date on key …

In electronic subscription and pay TV systems, data can be organized and encrypted using
symmetric key algorithms according to predefined time periods and user privileges and then …

Access control is an indispensable security component of cloud computing, and hierarchical
access control is of particular interest since in practice one is entitled to different access …

Security and privacy are widely recognized as important requirements for access and
management of electronic health record (EHR) data. In this paper, we argue that EHR data …

In this work, we construct a key access management scheme that seamlessly transitions any
hierarchical-like access policy to the digital medium. The proposed scheme allows any …

A hierarchical key assignment scheme is a method to assign some private information and
encryption keys to a set of classes in a partially ordered hierarchy, in such a way that the …

With the wide diffusion of cloud technologies, an ever increasing amount of sensitive data is
moved on centralized network-based repository services, providing elastic outsourced …

This study introduces a hierarchical key assignment scheme (HKAS) based on the closest
vector problem in an inner product space (CVP-IPS). The proposed scheme offers a …

Conventional hierarchical key assignment schemes have not been concerned with a
practical situation: Users might be assigned to a class for only a period of time. When a user …