Index Generation and Secure Multi-User Access Control over an Encrypted Cloud Data

Cloud computing provides economical and effective solution for sharing data among cloud users with low maintenance cost. The security of data and identity confidentiality while sharing data in multi-owner way cannot be assured by the Cloud Service Providers (CSP’s). The Cloud Service Providers are reliable but curious to know the recurrent membership changes in the cloud. In this paper,we propose a secure multi-owner data sharing for dynamic group in the cloud with RSA Chinese Remainder Theorem (RSA-CRT)encryption technique and substring index generation method. RSA-CRT efficiently manages revocation list, key management, with reduced storage and computational overhead. The substring Index generation algorithm reduces the storage space compared to wild card fuzzy alogorithm1

On Topology Control of Wireless Peer-to-Peer File Sharing Networks: Energy Efficiency, Fairness and Incentive

Given the recent rapidly developing high speed wireless communication technologies and high traffic demand for P2P file sharing applications, wireless P2P file sharing is widely reckoned as a key component of the next generation communication network. However, running P2P applications in a wireless medium entails different constraints compared with those in the traditional wired Internet. One of the challenges is that portable wireless devices are energy-limited since they are battery-operated and the battery has inevitably limited life. Fairness and incentive are also important issues. Unfortunately, designing a protocol taking all these factors into account is still a relatively unexplored problem. We propose a topology control protocol called TCP2P for wireless P2P file sharing networks. TCP2P increases the fairness and provides incentive in wireless P2P file sharing applications and is energy-conserving.published_or_final_versio

Toward software updates in IoT environments: Why Existing P2P Systems are not Enough

International audienceThe number of connected devices around us is growing, and their embedded software is increasing in complexity. Applications need to be managed and updated throughout their life-cycle. Modern software orchestrators and management systems are mostly cen-tralised and expensive to scale to very large systems. We propose a decentralised approach to distribute software updates to Internet of Things (IoT) devices using Peer-to-Peer (P2P) transfers. We seek to improve the efficiency of software update propagation by adapting system behaviour to IoT constraints, such as device heterogeneity, unreliable network connectivity and applications specifics

On localized application-driven topology control for energy-efficient wireless peer-to-peer file sharing

Wireless Peer-to-Peer (P2P) file sharing Is widely envisioned as one of the major applications of ad hoc networks in the near future. This trend is largely motivated by the recent advances in high-speed wireless communication technologies and high traffic demand for P2P file sharing applications. To achieve the ambitious goal of realizing a practical wireless P2P network, we need a scalable topology control protocol to solve the neighbor discovery problem and network organization problem. Indeed, we believe that the topology control mechanism should be application driven in that we should try to achieve an efficient connectivity among mobile devices in order to better serve the file sharing application. We propose a new protocol, which consists of two components, namely, Adjacency Set Construction (ASC) and Community-Based Asynchronous Wakeup (CAW). Our proposed protocol is shown to be able to enhance the fairness and provide an incentive mechanism in wireless P2P file sharing applications. It is also capable of increasing the energy efficiency. © 2008 IEEE.published_or_final_versio