Publications de Anwitaman Datta

A Generic Trust Framework For Large-Scale Open Systems Using Machine Learning

In many large-scale distributed systems and on the Web, agents need to interact with other unknown agents to carry out some tasks or transactions. The ability to reason about and assess the potential risks in carrying out such transactions is essential for ...

Wiley-Blackwell2014

Trust beyond reputation: A computational trust model based on stereotypes

Anwitaman Datta, Xin Liu

Models of computational trust support users in taking decisions. They are commonly used to guide users' judgements in online auction sites; or to determine quality of contributions in Web 2.0 sites. However, most existing systems require historical informa ...

Elsevier2013

Fuzzynet: Ringless Routing in a Ring-like Structured Overlay

Karl Aberer, Anwitaman Datta, Wojciech Galuba, Sarunas Girdzijauskas

Many structured overlay networks rely on a ring invariant as a core network connectivity element. The responsibility ranges of the participating peers and navigability principles (greedy routing) heavily depend on the ring structure. For correctness guaran ...

2011

Carrier transport and sensitivity issues in heterojunction with intrinsic thin layer solar cells on N-type crystalline silicon: A computer simulation study

Christophe Ballif, Anwitaman Datta, Père Roca i Cabarrocas

Heterojunction with intrinsic thin layer or HIT solar cells are considered favorable for large-scale manufacturing of solar modules, as they combine the high efficiency of crystalline silicon (c-Si) solar cells, with the low cost of amorphous silicon techn ...

American Institute of Physics2010

Structured Overlay For Heterogeneous Environments: Design and Evaluation of Oscar

Karl Aberer, Anwitaman Datta, Sarunas Girdzijauskas

Recent years have seen advances in building large internet-scale index structures, generally known as structured overlays. Early structured overlays realized distributed hash tables (DHTs) which are ill suited for anything but exact queries. The need to su ...

2010

Enabling Secure Secret Sharing in Distributed Online Social Networks

Karl Aberer, Anwitaman Datta, Sonja Buchegger

We study a new application of threshold-based secret sharing in a distributed online social network (DOSN), where users need a means to back up and recover their private keys in a network of untrusted servers. Using a simple threshold-based secret sharing ...

Ieee Computer Soc Press, Customer Service Center, Po Box 3014, 10662 Los Vaqueros Circle, Los Alamitos, Ca 90720-1264 Usa2009

Implementing a P2P Social Network - Early Experiences and Insights from PeerSoN

Anwitaman Datta, Sonja Buchegger

To address privacy concerns in Online Social Networks (OSNs), we propose to use a distributed, peer-to-peer approach coupled with encryption. To verify the feasibility of such an approach, we designed a two-tiered architecture and protocols that recreate t ...

2009

Optimal caching for first-order query load-balancing in decentralized index structures

Karl Aberer, Anwitaman Datta, Wolfgang Nejdl

Springer2007

Query-load balancing in structured overlays

Karl Aberer, Anwitaman Datta, Roman Schmidt

Query-load (forwarding and answering) balancing in structured overlays is one of the most critical and least studied problems. It has been assumed that caching heuristics can take care of it. We expose that caching, while necessary, is not in itself suffic ...

2007

Oscar: A Data-Oriented Overlay For Heterogeneous Environments

Karl Aberer, Anwitaman Datta, Sarunas Girdzijauskas

Quite a few data-oriented overlay networks have been designed in recent years. These designs often (implicitly) assume various homogeneity which seriously limit their usability in real world. In this paper we present some performance results of the Oscar o ...

2007