A fundamental approach for secure data sharing in a cloud environment is to let the data owner encrypt data before outsouring. To simultaneously achieve fine-grained access control on encrypted data and scalable user revocation, existing work combines attribute-based encryption (ABE) and proxy re-encryption (PRE) to delegate the cloud service provider (CSP) to execute re-encryption. However, th...

The democratization of ubiquitous computing (access data anywhere, anytime, anyhow), the increasing connection of corporate databases to the Internet and the today’s natural resort to Web hosting companies and Database Service Providers strongly emphasize the need for data confidentiality. Users have no other choice than trusting Web companies arguing that their systems are fully secured and th...

Data are any and all of the digital materials that are collected and analyzed in the pursuit of scientific advances. In line with its stance on providing Open Access to research articles themselves, PLOS strongly believes that, to best foster scientific progress, the underlying data should be made freely available for researchers to use, wherever this is legal and ethical. Data availability all...