181 research outputs found
Systematizing Decentralization and Privacy: Lessons from 15 Years of Research and Deployments
Decentralized systems are a subset of distributed systems where multiple
authorities control different components and no authority is fully trusted by
all. This implies that any component in a decentralized system is potentially
adversarial. We revise fifteen years of research on decentralization and
privacy, and provide an overview of key systems, as well as key insights for
designers of future systems. We show that decentralized designs can enhance
privacy, integrity, and availability but also require careful trade-offs in
terms of system complexity, properties provided, and degree of
decentralization. These trade-offs need to be understood and navigated by
designers. We argue that a combination of insights from cryptography,
distributed systems, and mechanism design, aligned with the development of
adequate incentives, are necessary to build scalable and successful
privacy-preserving decentralized systems
From MANET to people-centric networking: Milestones and open research challenges
In this paper, we discuss the state of the art of (mobile) multi-hop ad hoc networking with the aim to present the current status of the research activities and identify the consolidated research areas, with limited research opportunities, and the hot and emerging research areas for which further research is required. We start by briefly discussing the MANET paradigm, and why the research on MANET protocols is now a cold research topic. Then we analyze the active research areas. Specifically, after discussing the wireless-network technologies, we analyze four successful ad hoc networking paradigms, mesh networks, opportunistic networks, vehicular networks, and sensor networks that emerged from the MANET world. We also present an emerging research direction in the multi-hop ad hoc networking field: people centric networking, triggered by the increasing penetration of the smartphones in everyday life, which is generating a people-centric revolution in computing and communications
A Survey In Network Economics: Spam Email, Internet Routing, Graphical Economics, and International Trade
A survey of current topics in network economics, a relatively new and growing field of research at the intersection of economics and network theory. Case studies in spam email, Internet routing, and graphical economics are presented as practical applications. A network economic analysis of international trade is also offered. Most of the current literature addresses a highly technical audience. This paper intends to bridge the gap by presenting network economics in language that will be familiar to students of economics
Tactful Networking: Humans in the Communication Loop
International audienceThis survey discusses the human-perspective into networking through the Tactful Networking paradigm, whose goal is to add perceptive senses to the network by assigning it with human-like capabilities of observation, interpretation, and reaction to daily-life features and associated entities. To achieve this, knowledge extracted from inherent human behavior in terms of routines, personality, interactions, and others is leveraged, empowering the learning and prediction of user needs to improve QoE and system performance while respecting privacy and fostering new applications and services. Tactful Networking groups solutions from literature and innovative interdisciplinary human aspects studied in other areas. The paradigm is motivated by mobile devices' pervasiveness and increasing presence as a sensor in our daily social activities. With the human element in the foreground, it is essential: (i) to center big data analytics around individuals; (ii) to create suitable incentive mechanisms for user participation; (iii) to design and evaluate both humanaware and system-aware networking solutions; and (iv) to apply prior and innovative techniques to deal with human-behavior sensing and learning. This survey reviews the human aspect in networking solutions through over a decade, followed by discussing the tactful networking impact through literature in behavior analysis and representative examples. This paper also discusses a framework comprising data management, analytics, and privacy for enhancing human raw-data to assist Tactful Networking solutions. Finally, challenges and opportunities for future research are presented
Selfishness need not be bad: a general proof
This article studies the user behavior in non-atomic congestion games. We
consider non-atomic congestion games with continuous and non-decreasing
functions and investigate the limit of the price of anarchy when the total user
volume approaches infinity. We deepen the knowledge on {\em asymptotically well
designed games} \cite{Wu2017Selfishness}, {\em limit games}
\cite{Wu2017Selfishness}, {\em scalability} \cite{Wu2017Selfishness} and {\em
gaugeability} \cite{Colini2017b} that were recently used in the limit analyses
of the price of anarchy for non-atomic congestion games. We develop a unified
framework and derive new techniques that allow a general limit analysis of the
price of anarchy. With these new techniques, we are able to prove a global
convergence on the price of anarchy for non-atomic congestion games with
arbitrary polynomial price functions and arbitrary user volume vector
sequences. Moreover, we show that these new techniques are very flexible and
robust and apply also to non-atomic congestion games with price functions of
other types. In particular, we prove that non-atomic congestion games with
regularly varying price functions are also asymptotically well designed,
provided that the price functions are slightly restricted. Our results greatly
generalize recent results. In particular, our results further support the view
with a general proof that selfishness need not be bad for non-atomic congestion
games.Comment: 68 pages, 2 figure
- …