Our modern society is increasingly relying on the collection, processing, and sharing of
digital information. There are two fundamental trends:(1) Enabled by the rapid developments …

With more and more enterprises sharing their sensitive data on cloud servers, building a
secure cloud environment for data sharing has attracted a lot of attention in both the industry …

Attribute-Based Encryption (ABE) with non-monotonic access policies provides fine-grained
access control for widespread applications like Cloud-assisted HealthIoT systems. In this …

Encryption technology can be incorporated into access control mechanisms based on user
identities, user attributes, or resource attributes. Traditional public-key encryption requires …

Attribute-based encryption (ABE) cryptographically implements fine-grained access control
on data. As such, data can be stored by an entity that is not necessarily trusted to enforce …

Abstract Cloud Service Providers (CSPs) allow data owners to migrate their data to resource-
rich and powerful cloud servers and provide access to this data by individual users. Some of …

Several existing access control solutions mainly focus on preserving confidentiality of stored
data from unauthorized access and the storage provider. Moreover, to keep sensitive user …

With the emergence of decentralized systems and distributed infrastructures, access control
to outsourced data becomes more complex, as it should be flexible and distinguishable …

We consider the task of interorganizational data sharing, in which data owners, data clients,
and data subjects have different and sometimes competing privacy concerns. One real …

Cloud computing, as an emerging computing paradigm, enables users to remotely store
their data into a cloud so as to enjoy scalable services on-demand. Especially for small and …