High-speed networks and ubiquitous Internet access become available to users for access anywhere at anytime. Cloud computing is a concept that treats the resources on the Internet as a unified entity, a Cloud storage is a model of... more
High-speed networks and ubiquitous Internet access become available to users for access anywhere at anytime. Cloud computing is a concept that treats the resources on the Internet as a unified entity, a Cloud storage is a model of networked online storage where data is stored in virtualized pools of storage which are generally hosted by third parties. Hosting companies operate large data centers, The data center operators, in the background, virtualized the resources according to the requirements of the customer and expose them as storage pools, which the customers can themselves use to store files or data objects. Physically, the resource may span across multiple servers. Data robustness is a major requirement for storage systems. There have been many proposals of storing data over storage servers. One way to provide data robustness is to replicate a message such that each storage server stores a copy of the message. A decentralized erasure code is suitable for use in a distributed storage system.
As adoption of eHealth solutions advances, new computing paradigms - such as cloud computing - bring the potential to improve efficiency in managing medical health records and help reduce costs. However, these opportunities introduce new... more
As adoption of eHealth solutions advances, new computing paradigms - such as cloud computing - bring the potential to improve efficiency in managing medical health records and help reduce costs. However, these opportunities introduce new security risks which can not be ignored. In this paper, we present a forward-looking design for a privacy-preserving eHealth cloud system. The proposed solution, is based on a Symmetric Searchable Encryption scheme that allows patients of an electronic healthcare system to securely store encrypted versions of their medical data and search directly on them without having to decrypt them first. As a result, the proposed protocol offers better protection than the current available solutions and paves the way for the next generation of eHealth systems.
Online Social Networks (OSN) have changed how individuals interact with each other and with organizations, offering means of communication, publication and consumption of information. As OSNs have become a substantial part of users'... more
Online Social Networks (OSN) have changed how individuals interact with each other and with organizations, offering means of communication, publication and consumption of information. As OSNs have become a substantial part of users' online activities, OSN providers have understood the value of the data being generated and exploited it to maximize profits. Recently, malicious agents have invested in the manipulation of OSN data to attain commercial advantages or influence public opinion with dangerous consequences. This paper describes our ongoing efforts towards the use of Trusted Execution Environments (TEE), more specifically Intel's SGX, for the management of recommendation engines for OSNs. Our solution focuses on protection of user data and prevention of misuse without compromising OSNs' functionality nor OSNs' revenue from advertisements. We describe the architecture of our system and report performance results that can be used to guide the selection of recommendation algorithms for execution under SGX.
