No abstract

E-commerce security has recently been an emerging topic due to the escalation in credit card fraud and stolen user accounts. In general, the security bridge and privacy leakage occur on the side of e-commerce companies due to various factors such as flaws in the design of their storage systems. The stored information of users increases the risk on privacy bridge and to remedy such risks e-commerce companies are forced to make costly investments. The security threats also enforce the development of robust security protocols and methods in digital commerce systems. The current protocols and methods generally bring extra communication and computation costs to all parties involving in the e-commerce system and the security risk on the side of e-commerce companies still remains. In this paper, we propose a Secure E-commerce Scheme (SES) which alleviates the security threats on the side of e-commerce companies and reduces communication costs for all parties. The proposed secure e-commerce protocol, SES, is implemented, analyzed and compared to two well-known schemes; Secure Electronic Transaction (SET) and 3D Secure.INDEX TERMS E-commerce security, security protocol, algorithm development, symmetric key cryptography.

Addressing energy efficiency in P2P services has the potential to make the Internet greener since they comprise a major source of the Internet data traffic. In this paper, we consider approaches for green Internet file sharing. We develop simulation models of proxy-based energy efficient BitTorrent as well as legacy BitTorrent on PeerSim P2P simulator, and explore their characteristics on large-scale scenarios. Our aim is first to identify the operating conditions where proxy-based BitTorrent outperforms the legacy protocol in terms of overall energy efficiency, and then to develop optimizations for the proxy-based approac

Several Peer-to-Peer (P2P) protocols and applications have been developed to allow file distribution/sharing, video and music streaming, and data and information dissemination. These P2P systems are regularly used by a large number of users, both in desktop and mobile environments, and they generate a remarkable portion of the overall Internet traffic. However, many common P2P protocols and applications were designed neglecting the energy problem. In fact, they often require always-on devices in order to work properly, thus producing significant energy waste. The problem is even more relevant in the mobile context, since the battery lifetime of mobile devices is limited. Therefore, energy efficiency in P2P systems is a highly debated topic in the literature. New P2P approaches—more energy efficient than traditional client/server solutions—have been proposed. In addition, several improvements to existing P2P protocols have been introduced to reduce their energy consumption. In this article, we present a general taxonomy to classify state-of-the-art approaches to the energy problem in P2P systems and applications. Then, we survey the main solutions available in the literature, focusing on three relevant classes of P2P systems and applications: file sharing/distribution , content streaming, and epidemics . Furthermore, we outline open issues and provide future research guidelines for each class of P2P systems.

P2P systems and applications have achieved increasing popularity in the last years due to the characteristics of dynamicity and scalability of the peer-to-peer paradigm. Currently, P2P applications -especially file sharing and file distribution applications -generate a remarkable portion of the overall Internet traffic. However, many common P2P protocols do not consider the energy problem. Frequently, hosts are requested to stay on and connected to the network for long times. Therefore, they are very energy-consuming. In this chapter, we present a general taxonomy to classify possible approaches to the energy problem in P2P systems and applications. Then, we survey the main solutions available in the literature, focusing on two relevant classes of P2P protocols, namely file sharing/distribution protocols (e.g., BitTorrent and Gnutella) and epidemic P2P protocols.