Papers
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@inproceedings{msmob2010,
title = {Identity Driven Mobility Architecture},
author = {Alfredo Matos and Ricardo Pereira and Joao Girao},
booktitle = {Future Network and Mobile Summit},
year = {2010},
address = {Florence, Italy},
month = {June},
organization = {MS'10},
abstract = {
This paper describes an identity based mobility architecture, which relies on the Identity Management System for mobility decision and execution. This is achieved by clearly separating mobility into a two step procedure: decision and action. The decisions are outsourced on the Identity plane, while the action (moving) is carried out by a protocol agnostic mobility architecture.
},
isbn = {978-1-905824-16-8},
pdf = {./files/papers/ms2010-mob.pdf},
url = {http://www.futurenetworksummit.eu/2010/},
cfp = {./files/papers/ms2010-cfp.pdf},
pubtype = {paper}
}
@inproceedings{mspriv2010,
title = {Cross Layer Privacy Support for Identity Management},
author = {Rodolphe Marques and Rui Ferreira and Alfredo Matos},
booktitle = {Future Network and Mobile Summit},
year = {2010},
address = {Florence, Italy},
month = {June},
organization = {MS'10},
isbn = {978-1-905824-16-8},
abstract = {
One of the most important objectives of Identity Management (IdM) Systems is to provide end user privacy. However, these concepts rarely extend beyond the application layer. In the IST SWIFT project a special attention is given to cross-layer Identity Management support, and in this paper we show why applying only IdM solutions is insufficient to preserve user privacy if network mechanisms are not considered. We present a solution to retain user privacy by using network pseudonyms closely coordinated with the IdM framework proposed by the SWIFT project. We include these concepts in the IdM framework and present the necessary architecture and functional mechanisms required to support the privacy extensions.
},
note = {},
pdf = {./files/papers/ms2010-pseudo.pdf},
url = {http://www.futurenetworksummit.eu/2010/},
cfp = {./files/papers/ms2010-cfp.pdf},
pubtype = {paper}
}
@inproceedings{mssec2010,
title = {Security and Privacy Enablers for Future Identity Management Systems},
author = {Marc Barisch and Elena Torroglosa and Mario Lischka and Rodolphe Marques and Ronald Marx and Alfredo Matos and Alejandro Perez and Dirk Scheuermann},
booktitle = {Future Network and Mobile Summit},
year = {2010},
address = {Florence, Italy},
month = {June},
organization = {MS'10},
isbn = {978-1-905824-16-8},
abstract = {
In recent years, Identity Management (IdM) has gained a lot of attention in industry, standardisation and academia. In particular, a couple of research projects, like Daidalos or Prime, have invested considerable effort to bring IdM forward, to take advantage of features like improved usability and security. Nevertheless, there are important issues that have not been addressed so far. The SWIFT project leverages IdM as a key technology of the Future Internet, tackling problems like the integration of the network and application layer from an IdM perspective as well as the use of electronic identity cards. Moreover, aspects like the integration of several user devices, backward compatibility and a new access control infrastructure are required by future IdM solutions. We consider all these aspects by extending existing IdM solutions with six new security and privacy enablers that are part of the overall SWIFT framework. These enablers have been partially implemented towards a new IdM architecture. First evaluation results of the implementation are promising to pave the way towards future IdM solutions.
},
note = {},
pdf = {./files/papers/ms2010-pe.pdf},
url = {http://www.futurenetworksummit.eu/2010/},
cfp = {./files/papers/ms2010-cfp.pdf},
pubtype = {paper}
}
@inproceedings{iscc2009,
title = {Integrating User Identity Management Systems with the Host Identity Protocol},
author = {Marc Barisch and Alfredo Matos},
booktitle = {The Fourteenth IEEE Symposium on Computers and Communications},
year = {2009},
address = {Sousse, Tunisia},
month = {July},
organization = {ISCC '08},
note = {},
abstract = {
Identity Management (IdM) on the application layer improves the usability and
security for end users by offering features like Single Sign-On and attribute
provisioning. Unrelated approaches on the network layer introduce identity
concepts to solve mobility problems and support multihoming. This paper
describes a novel approach to the integration of IdM on the application layer
with identity concepts introduced by the Host Identity Protocol (HIP). We
propose an integrated architecture combining the advantages of both domains. In
this scope, we tackle the mapping between the HIP namespace and user IdM
namespace as well as we the management and assignment of user and host
identities. The new architecture provides a unified view over user and host
identities, enabling the exchange of user and host attributes, while it also
provides enhanced security and network features.
},
note = {},
pdf = {./files/papers/iscc2009.pdf},
url = {http://www.comsoc.org/iscc/2009/},
cfp = {./files/papers/iscc2009-cfp.pdf},
pubtype = {paper}
}
@inproceedings{onit2009,
title = {Deploying and testing a NGN testbed : IST Daidalos Testbed},
author = {Diogo Gomes and Alfredo Matos and Emanuel Fonseca and Rui Aguiar},
booktitle = {Open NGN and IMS Testbeds Workshop at TRIDENTCOM 2009},
year = {2009},
address = {Washington, USA},
month = {April},
organization = {ONIT '09},
note = {},
abstract = {
In the last 3 years a medium size NGN testbed was deployed at the Instituto de
Telecomunicações of Aveiro in order to support the validation of the project
IST-Daidalos. This paper intends to describe not only the work done in order to
setup and maintain this testbed but also to elucidate the community of some of
the caveats of creating and managing such a testbed in a environment where most
of the prototypes are under specification and requirements change quickly. In
this paper we also present some of the methodology used in order to extract
results from this testbed and an insight to what can be done in the future.
},
note = {},
pdf = {./files/papers/onit2009.pdf},
url = {http://www.onit-ws.org/},
cfp = {./files/papers/onit2009-cfp.pdf},
pubtype = {paper}
}
@inproceedings{wpmc2008,
title = {Mobility Aware Paths: The Identity Connection},
author = {Alfredo Matos and Rui Aguiar},
booktitle = {Special Sessions of the 11th International Symposium on Wireless Personal Multimedia Communications},
year = {2008},
address = {Lapland, Finland},
month = {September},
organization = {WPMC '08},
note = {ISSN 1883-1192},
abstract = {
This paper discusses the challenges that arise from today's mobility management
architectures, how they are restricted to specific identifiers and routes, and
how they have disjoint control layers. It describes a novel approach to
tackling the shortcomings of current network models, describing the challenges
and solutions revolving around Identifiers and Identity based Mobility,
associated with the more generic Path concept. It describes how to position
communication and mobility, Identity centric, in terms of paths, and in the
process solving the challenges raised by the unicast/multicast dichotomy,
effectively bridging the gap between peer-to-peer overlays and point-to-point
communications. The paper also discusses the need for cross-layer resolution
and routing mechanisms that enable simple and consistent access to an Identity
Layer, which is in fact the new control layer, leveraged by policy driven
architectures enabling the necessary granularity for future network evolution.
},
note = {},
pdf = {./files/papers/wpmc2008.pdf},
url = {http://www.cwc.oulu.fi/wpmc2008/},
cfp = {./files/papers/wpmc2008-cfp.pdf},
pubtype = {paper}
}
@inproceedings{globecom2007,
title = {Preserving Privacy in Mobile Envinronments},
author = {Alfredo Matos and João Girão and Susana Sargento and Rui Aguiar},
booktitle = {Globecom '07},
year = {2007},
address = {Washington D.C., USA},
month = {November},
organization = {Globecom2007},
abstract = {
User privacy is a growing requirement in the evolution of communication
networks. In this sense, the concept of virtual personae, which corresponds to
different identities of the same user, starts getting much attention. However,
to provide privacy and non-linkage between these virtual users, a cross-layer
approach to identity needs to be supported. This paper proposes a solution to
preserve the application layer privacy models by applying the virtual personae
concept throughout the network stack. It also proposes mechanisms for
non-correlation between identities in 4G mobile environments, and addresses the
benefits of the evolving multi-homing characteristics of 4G networks to enrich
the non-linkage between identities support of our privacy solution.
},
note = {},
pdf = {./files/papers/globecom2007.pdf},
url = {http://www.comsoc.org/confs/globecom/2007/},
cfp = {./files/papers/globecom2007-cfp.pdf},
pubtype = {paper}
}
@inproceedings{mobiarch2007,
title = {Embedding Identity in Mobile Environments},
author = {Alfredo Matos and Susana Sargento and Rui Aguiar},
booktitle = {Second {ACM/IEEE} International Workshop on Mobility in the Evolving Internet Architecture},
year = {2007},
address = {Kyoto, Japan},
month = {October},
organization = {MobiArch2007},
abstract = {
Recent trends bring Identity concepts into the application layer, although
usually focusing in web environments. While this enables new solutions,
interactions and paradigms at the application layer, the lower layers are
neglected, and considered irrelevant for identity purposes. However, making
Identity information available to the OSI stack enables enhanced protocols,
which better integrate with A4C mechanisms, and provide better cross-layer
integration. We present a solution to integrate identity information into all
layers of the OSI stack, and enhance it with resolution mechanisms, enabling
full fledged use of Identity by lower layers, such as transport and network. In
particular, a new mobility paradigm can be created through an
identity-dependent design.
},
note = {Held in conjunction with SIGCOMM 2007},
pdf = {./files/papers/mobiarch2007.pdf},
url = {http://user.informatik.uni-goettingen.de/~mobiarch/2007},
cfp = {./files/papers/mobiarch2007-cfp.pdf},
pubtype = {paper}
}
@inproceedings{infocom2007,
author = {Frederik Armknecht and Joao Girao and Alfredo Matos and Rui L. Aguiar},
title = {Who said that? Privacy at link layer},
booktitle = {26th Annual IEEE Conference on Computer Communications},
year = {2007},
address = {Anchorage, Alaska, USA},
month = {May},
organization = {INFOCOM 2007},
note = {Minisymposium},
abstract = {
Wireless LAN and other radio broadcast technologies are now in full
swing. However, the widespread usage of these technologies
comes at the price of location privacy, be it by observing the
communication patterns or the interface identifiers. Although a
number of network level solutions have been proposed , this
paper describes a novel approach to location privacy at the
link layer level. We present a generic mechanism and then map
it to a real protocol, IEEE 802.11. The work also provides an
analysis of the protocol in terms of privacy and performance
considerations.
},
pdf = {./files/papers/infocom2007.pdf},
url = {http://www.comsoc.org/confs/infocom/2007/},
cfp = {./files/papers/infocom2007-cfp.pdf},
pubtype = {paper}
}
@inproceedings{mobiarch2006,
title = {{HIP} Location Privacy Framework},
author = {Alfredo Matos and Justino Santos and Susana Sargento and Rui Aguiar and Joao Girao and Marco Liebsch},
booktitle = {First {ACM/IEEE} International Workshop on Mobility in the Evolving Internet Architecture},
year = {2006},
address = {San Francisco, USA},
month = {December},
organization = {MobiArch2006},
abstract = {
Privacy and security are key aspects in future network architectures.
The Host Identity Protocol (HIP) is a new proposal which decouples
identifiers from locators and may eventually replace conventional
addressing and network transport.
In this document we propose an architecture that provides location
privacy, based on HIP. We further validate our work by implementation
and support the feasibility of our protocol by experimentation.
},
note = {Held in conjunction with GLOBECOM 2006},
pdf = {./files/papers/mobiarch2006.pdf},
url = {http://user.informatik.uni-goettingen.de/~mobiarch/2006},
cfp = {./files/papers/mobiarch2006-cfp.pdf},
pubtype = {paper}
}
@inproceedings{mws2006,
title = {{QoS} Signaling in 4G Scenarios},
author = {Susana Sargento and Diogo Gomes and Alfredo Matos and Rui Aguiar},
booktitle = {IST Mobile and Wireless Summit},
year = {2006},
address = {Myconos, Greece},
month = {June},
organization = {MWS2006},
abstract = {
This paper presents an evaluation of possible a QoS architecture and the
corresponding QoS signalling strategies for next generation networks, being
developed inside the IST project Daidalos. We address the main results achieved
in terms of their performance in an experimental testbed developed inside the
project. The result provide indications on the expected performance of
different signalling strategies for next generation heterogeneous networks.
},
note = {},
pdf = {./files/papers/mws2006.pdf},
pubtype = {paper}
}
@inproceedings{ict2006,
title = {Proxy Usage for Vehicular Networks Interconnection},
author = {Alfredo Matos and Justino Santos and Rui Aguiar and Roberto Baldessari and Andreas Festag},
booktitle = {Thirteenth Internationl Conference on Telecommunications},
year = {2006},
address = {Madeira, Portugal},
month = {March},
organization = {ICT2006},
abstract = {
This paper discusses the introduction of a new network element - MIPv6 Proxy -
to act on behalf of registering nodes on a moving car network. The new element
allows increased performance, while reducing communication costs and enhancing
communication in general.
},
note = {},
pdf = {./files/papers/ict2006.pdf},
url = {http://www.ict2006.org/},
pubtype = {paper}
}
@inproceedings{wit2006,
title = {Flexible Connectivity Management in Vehicular Communication Networs},
author = {Roberto Baldessari and Andreas Festag and Alfredo Matos and Justino Santos and Rui Aguiar},
booktitle = {Third Internationl Workshop on Intelligent Transportation},
pages = {756-758},
year = {2006},
address = {Hamburg, Germany},
month = {March},
organization = {WIT2006},
abstract = {
Vehicular communication, providing vehicle-to-vehicle and vehicle-to-roadside
communication, can considerably improve traffic safety and comfort of driving
and traveling. For communication in vehicular ad hoc networks, position-based
routing has emerged as a promising candidate. For Internet access, Mobile IPv6
is a widely accepted solution to provide session continuity and reachability to
the Internet for mobile nodes. While integrated solutions for usage of Mobile
IPv6 in (non-vehicular) mobile ad hoc networks exist, we propose a solution
that, built upon on a Mobile IPv6 proxy-based architecture, selects the optimal
communication mode (direct in-vehicle, vehicle-tovehicle, and
vehicle-to-roadside communication) and provides dynamic switching between
vehicle-to-vehicle and vehicle-to-roadside communication mode during a
communication session in case thatmore than one communication mode is
simultaneously available.
},
note = {},
pdf = {./files/papers/wit2006.pdf},
pubtype = {paper}
}
Journals
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@article{wcm2008,
title = {Towards Dependable Networking: Secure Location and Privacy at Link Layer},
author = {Alfredo Matos and João Girão and Frederik Armnecht and Rui Aguiar},
journal = {IEEE Wireless Communications Magazine},
month = {October},
year = {2008},
volume = {15},
number = {6},
issn = {1536-1284},
note = {Special Issue on Dependability Issues with Ubiquitous Wireless Access},
organization = {IEEE WCM},
abstract = {
WLAN and other radio broadcast technologies are now commonplace. However, the
widespread usage of these technologies comes at the price of loss of location
privacy. Although a number of network level solutions exist to lessen the
problem, we describe an improved approach to location privacy at the link
layer. We present a generic mechanism and then map it to the common IEEE 802.11
protocol set. The paper finally provides an analysis of our mechanism in terms
of privacy and performance.
},
url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4653129},
pubtype = {journal}
}
@article{springer2008,
title = {Virtual Identity Framework for Telecom Infrastructures},
author = {Amardeo Sarma and Alfredo Matos and João Girão and Rui Aguiar},
journal = {Wireless Personal Communications},
volume = {45},
number = {4},
pages = {521-543},
month = {June},
year = {2008},
address = {Netherlands},
organization = {Springer},
abstract = {
Identity Management has so far been a field mainly applications and Web
focused. This paper describes a novel approach to cross layer identity
management that extends digital identities to the network, the virtual identity
(VID) framework. The VID framework provides strong privacy to the user, while
easily supporting personalization cross-service providers. While other identity
management solutions are tailored to one specific application and/or protocol
domain, the proposed framework extends the use of one’s digital identity to all
aspects of the network and services architecture. It is also the first to
consider legal constrains, such as ownership of data and legal intercept
issues, in such a broad scope. One major aspect reported here is the relevance
for operators.
},
issn = {0929-6212},
doi = {10.1007/s11277-008-9475-4},
url = {http://www.springerlink.com/content/n52393g67375561j},
cfp = {http://www.springer.com/engineering/signals/journal/11277},
pubtype = {journal}
}
@inproceedings{hipdet2006,
title = {Location Privacy Extensions for the Host Identity Protocol},
author = {Alfredo Matos and Justino Santos and Rui Aguiar and Joao Girao and Marco Liebsch},
booktitle = {Revista do Departamento Electrónica e Telecomunicações},
year = {2007},
address = {Universidade de Aveiro, Portugal},
volume = {4, nº 8},
organization = {DET},
abstract = {
Privacy and security are key aspects on future communication networks. The Host
Identity (HIP) aims to provide identity based security in new networks. In this
document we propose an aditional framework based on the Host Identity Protocol
that provides location privacy to registered attendents.
},
note = {},
pdf = {./files/papers/revdetiua2007.pdf},
pubtype = {journal}
}
@inproceedings{vhdldet2006,
title = {Desenvolvimento de um processador de 8 bits em VHDL},
author = {Alfredo Matos},
booktitle = {Revista do Departamento Electrónica, Telecomunicações e Informática},
volume = {4, nº6},
year = {2006},
address = {Universidade de Aveiro, Portugal},
month = {March},
organization = {DETI},
abstract = {
Este artigo descreve o desenvolvimento de um processador de 8 bits que executa
operações aritméticas e lógicas, auxiliado por uma memória de registo e outra
de armazenamento. O processador tem de executar algumas operações particulares
que incluem operações entre dados residentes na memória de armazenamento, sem
recorrer a memória de registos, leitura de informação da placa FPGA, e também
impressão de resultados num meio visual.
},
note = {In Portuguese},
pdf = {./files/papers/revdetiua2006.pdf},
pubtype = {journal}
}
Drafts
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@misc{draftlmmif2007,
author = {Daniel Corujo and Alfredo Matos and Rui Aguiar and Julien Abeille and Telemaco Melia},
title = {Problem Statement on Common Interfaces for Local Mobility Management},
howpublished = {Internet Draft},
year = {2007},
month = {March},
note = {Expired},
abstract = {
This memo is a problem statement on the use of link events for enhanced
handover control in network based localized mobility management. Starting from
existing solutions for fast link detection the document aims at discussing
possibilities to extend with a 2.5 layer the interface between MN and AR for
handover control. The document also presents a set of considerations and
identifies conditions where a layer 2.5 based interface offers significant
advantages compared to a pure layer three solution. The document addresses
separately scenarios for Localized Mobility Management and scenarios involving
interactions between PMIP and CMIP.
},
txt = {./files/drafts/draft-corujo-ps-common-interfaces-lmm-01.txt},
pubtype = {draft}
}
@misc{drafthip2006,
author = {Alfredo Matos and Justino Santos and João Girão and Marco Liebsch and Rui Aguiar},
title = {HIP Privacy Extensions - Version 01 (Revised)},
howpublished = {Internet Draft - Expired},
year = {2006},
month = {March},
abstract = {
This memo describes a framework for the Host Identity Protocol that provides
location privacy and mobility to end hosts. It discusses the introduction of a
new functional entity that prevents HIP enabled nodes from revealing their
location.
},
note = {Expired},
txt = {./files/drafts/draft-matos-hip-privacy-extensions-01.txt},
pubtype = {draft}
}
@misc{drafthip2005,
author = {Alfredo Matos and Justino Santos and João Girão and Marco Liebsch and Rui Aguiar},
title = {HIP Privacy Extensions - Version 00},
howpublished = {Internet Draft},
year = {2005},
month = {August},
abstract = {
This memo describes a framework for the Host Identity Protocol that
provides location privacy and mobility to end hosts.
},
note = {Expired},
txt = {./files/drafts/draft-matos-hip-privacy-extensions-01.txt},
pubtype = {draft}
}