Universidad Autonoma de Madrid

Displaying 1-22 of 22 results

  • White Papers // Jan 2012

    Formal Security Analysis of Registration Protocols for Interactive Systems: A Methodology and a Case of Study

    In this paper, the authors present and formally analyze CHAT-SRP (CHAos based Tickets-Secure Registration Protocol), a protocol to provide interactive and collaborative platforms with a cryptographically robust solution to classical security issues. Namely, they focus on the secrecy and authenticity properties while keeping a high usability. Indeed, most interactive platforms...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Dec 2011

    Iris Liveness Detection Based on Quality Related Features

    A new liveness detection scheme for iris based on quality related measures is presented. The novel anti-spoofing technique is tested on a database comprising over 1,600 real and fake (high quality printed images) iris samples proving to have a very high potential as an effective protection scheme against direct attacks....

    Provided By Universidad Autonoma de Madrid

  • White Papers // Nov 2011

    Evolutionary Discriminative Confidence Estimation for Spoken Term Detection

    Spoken Term Detection (STD) is the task of searching for occurrences of spoken terms in audio archives. It relies on robust confidence estimation to make a hit/False Alarm (FA) decision. In order to optimize the decision in terms of the STD evaluation metric, the confidence has to be discriminative. Multi-Layer...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jul 2011

    Predicting Iris Vulnerability to Direct Attacks Based on Quality Related Features

    A new vulnerability prediction scheme for direct attacks to iris recognition systems is presented. The objective of the novel technique, based on a 22 quality related parameterization, is to discriminate beforehand between real samples which are easy to spoof and those more resistant to this type of threat. The system...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Mar 2011

    Comparison in Power Consumption of Static and Dynamic WDM Networks

    Greening of the Internet has become one of the main challenges for the research community. Optical networks can provide an energy efficient solution, but it has become crucial to assess its power efficiency. In this paper, dynamic operation of WDM networks is expected to provide significant power savings when compared...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Feb 2011

    Investment Rates And The Aggregate Production Function

    In this paper, the authors consider a simple version of the neoclassical growth model, and carry out an empirical analysis of the main determinants of aggregate investment across countries. More specifically, they study the effects on aggregate investment of income growth, capital income shares, the relative price of capital, and...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jan 2011

    Social Networks And Trade Of Services: Modeling Interregional Tourism Flows

    Recent literature on border effects has fostered research on informal barriers to trade and the role played by network dependencies. In relation to social networks, it has been shown that intensity of trade in goods is positively correlated with migration flows between pairs of countries/regions. In this paper the authors...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jan 2011

    On the Early Release of Burst-Control Packets in Optical Burst-Switched Networks

    In optical burst-switched networks, the so-called burst-control packet is sent a given offset-time ahead of the optical data burst to advertise the imminent burst arrival, and reserve a time-slot at each intermediate node to allocate the incoming optical burst. This paper proposes a methodology to estimate the number of packets...

    Provided By Universidad Autonoma de Madrid

  • White Papers // May 2010

    Towards a Better Understanding of the Performance of Latent Fingerprint Recognition in Realistic Forensic Conditions

    This paper studies the performance of a state-of-the-art fingerprint recognition technology, in several practical scenarios of interest in forensic casework. First, the differences in performance between manual and automatic minutiae extraction for latent fingerprints are presented. Then, automatic minutiae extraction is analyzed using three different types of fingerprints: latent, rolled...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Apr 2010

    Scenario-Based Score Fusion for Face Recognition at a Distance

    The effect of different acquisition distances on the performance of face verification is studied. In particular, the authors evaluate two standard approaches using popular features (DCT and PCA) and matchers (GMM and SVM) under variation in the acquisition distance, as well as their score-level combination. The DCT-GMM-based system is found...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jan 2010

    A Semantically Distributed Approach to Map IP Traffic Measurements to a Standardized Ontology

    Traffic monitoring in IP networks is a key issue for operators to guarantee Service Level Agreement both to their clients and with regards to other connectivity providers. Thus, having efficient solutions for traffic measurement and monitoring supports a good deal of their business and it is essential to fair development...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Dec 2009

    Patents Of Introduction And The Spanish Innovation System

    It is very apparent that the processes of technological change occurring throughout the last two centuries are intimately related to the sustained production and population growth among numerous economies. The acceleration of technological and organizational innovations -inherent to industrialization phenomena which expanded from western Europe to other parts of the...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Sep 2009

    Signature Verification on Handheld Devices

    Signature verification for handheld devices (e.g. smartphones, PDAs, etc.) as an authentication method is studied. Signature can be used to authenticate users in mobile networks for secure transactions. The challenges of signature verification on mobile devices are addressed and analyzed and the architecture for a verification platform is outlined. The...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jun 2009

    Fingerprint Liveness Detection Based on Quality Measures

    A new fingerprint parameterization for liveness detection based on quality measures is presented. The novel feature set is used in a complete liveness detection system and tested on the development set of the LivDET competition, comprising over 4,500 real and fake images acquired with three different optical sensors. The proposed...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jun 2009

    Trade Openness, Institutional Change And Economic Growth

    This paper explores the relationship between trade openness and economic growth through a change in institutions. To do so, the paper creates a theory of endogenous institutional change where there are three social groups; each one owns a specific production factor. An ellite (landowners) controlling the political power fix higher...

    Provided By Universidad Autonoma de Madrid

  • White Papers // May 2009

    Biometrics Beyond the Visible Spectrum: Imaging Technologies and Applications

    Human body images acquired at visible spectrum have inherent restrictions that hinder the performance of person recognition systems built using that kind of information (e.g. scene artefacts under varying illumination conditions). One promising approach for dealing with those limitations is using images acquired beyond the visible spectrum. This paper reviews...

    Provided By Universidad Autonoma de Madrid

  • White Papers // May 2009

    Millimeter-And Submillimeter-Wave Imaging Technologies for Biometric Purposes

    The inherent restrictions of human body images acquired at visible spectrum hinder the performance of person recognition systems built using that kind of information (e.g. scene artifacts under varying illumination conditions). One promising approach for dealing with those limitations is using images acquired out of the visible spectrum. This paper...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Apr 2009

    On the Vulnerability of Face Verification Systems to Hill-Climbing Attacks

    In this paper, the authors use a general hill-climbing attack algorithm based on Bayesian adaption to test the vulnerability of two face recognition systems to indirect attacks. The attacking technique uses the scores provided by the matcher to adapt a global distribution computed from an independent set of users, to...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jan 2009

    Synthetic Generation of Handwritten Signatures Based on Spectral Analysis

    A new method to generate synthetic online signatures is presented. The algorithm uses a parametrical model to generate the synthetic Discrete Fourier Transform (DFT) of the trajectory signals, which are then refined in the time domain and completed with a synthetic pressure function. Multiple samples of each signature are created...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jan 2009

    Improving the Enrollment in Dynamic Signature Verification With Synthetic Samples

    A novel scheme to generate multiple synthetic samples from a real on-line handwritten signature is proposed. The algorithm models a transmission channel which introduces a certain distortion into the real signature to produce the different synthetic samples. The method is used to increase the amount of data of the clients...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jun 2008

    The Evolution Of The Labor Market and Leisure Industries In Spain: Quality Of Life Versus Standard Of Living

    The authors discuss the effects that the emergence of the new post-industrial form of flexible capitalist organization has on the Spanish labor market and, by extension, on the working life of two representative groups of employees characterized by their casual and stable working conditions. This brings a growing duality in...

    Provided By Universidad Autonoma de Madrid

  • White Papers // May 2008

    Recent Investments In Human Capital And Its Effect On The Chances Of Escaping From Low-Paid Jobs: The Spanish Case

    General education and training are major forces determining earnings. According to the human capital model, wage differentials among individuals over the life-cycle are largely the result of different patterns of investment in human capital. This paper is intended to analyze the effects of recent investments in human capital - general...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jun 2009

    Fingerprint Liveness Detection Based on Quality Measures

    A new fingerprint parameterization for liveness detection based on quality measures is presented. The novel feature set is used in a complete liveness detection system and tested on the development set of the LivDET competition, comprising over 4,500 real and fake images acquired with three different optical sensors. The proposed...

    Provided By Universidad Autonoma de Madrid

  • White Papers // May 2009

    Biometrics Beyond the Visible Spectrum: Imaging Technologies and Applications

    Human body images acquired at visible spectrum have inherent restrictions that hinder the performance of person recognition systems built using that kind of information (e.g. scene artefacts under varying illumination conditions). One promising approach for dealing with those limitations is using images acquired beyond the visible spectrum. This paper reviews...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Sep 2009

    Signature Verification on Handheld Devices

    Signature verification for handheld devices (e.g. smartphones, PDAs, etc.) as an authentication method is studied. Signature can be used to authenticate users in mobile networks for secure transactions. The challenges of signature verification on mobile devices are addressed and analyzed and the architecture for a verification platform is outlined. The...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jan 2012

    Formal Security Analysis of Registration Protocols for Interactive Systems: A Methodology and a Case of Study

    In this paper, the authors present and formally analyze CHAT-SRP (CHAos based Tickets-Secure Registration Protocol), a protocol to provide interactive and collaborative platforms with a cryptographically robust solution to classical security issues. Namely, they focus on the secrecy and authenticity properties while keeping a high usability. Indeed, most interactive platforms...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Nov 2011

    Evolutionary Discriminative Confidence Estimation for Spoken Term Detection

    Spoken Term Detection (STD) is the task of searching for occurrences of spoken terms in audio archives. It relies on robust confidence estimation to make a hit/False Alarm (FA) decision. In order to optimize the decision in terms of the STD evaluation metric, the confidence has to be discriminative. Multi-Layer...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Dec 2009

    Patents Of Introduction And The Spanish Innovation System

    It is very apparent that the processes of technological change occurring throughout the last two centuries are intimately related to the sustained production and population growth among numerous economies. The acceleration of technological and organizational innovations -inherent to industrialization phenomena which expanded from western Europe to other parts of the...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jan 2010

    A Semantically Distributed Approach to Map IP Traffic Measurements to a Standardized Ontology

    Traffic monitoring in IP networks is a key issue for operators to guarantee Service Level Agreement both to their clients and with regards to other connectivity providers. Thus, having efficient solutions for traffic measurement and monitoring supports a good deal of their business and it is essential to fair development...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Mar 2011

    Comparison in Power Consumption of Static and Dynamic WDM Networks

    Greening of the Internet has become one of the main challenges for the research community. Optical networks can provide an energy efficient solution, but it has become crucial to assess its power efficiency. In this paper, dynamic operation of WDM networks is expected to provide significant power savings when compared...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jan 2011

    On the Early Release of Burst-Control Packets in Optical Burst-Switched Networks

    In optical burst-switched networks, the so-called burst-control packet is sent a given offset-time ahead of the optical data burst to advertise the imminent burst arrival, and reserve a time-slot at each intermediate node to allocate the incoming optical burst. This paper proposes a methodology to estimate the number of packets...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Feb 2011

    Investment Rates And The Aggregate Production Function

    In this paper, the authors consider a simple version of the neoclassical growth model, and carry out an empirical analysis of the main determinants of aggregate investment across countries. More specifically, they study the effects on aggregate investment of income growth, capital income shares, the relative price of capital, and...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Apr 2009

    On the Vulnerability of Face Verification Systems to Hill-Climbing Attacks

    In this paper, the authors use a general hill-climbing attack algorithm based on Bayesian adaption to test the vulnerability of two face recognition systems to indirect attacks. The attacking technique uses the scores provided by the matcher to adapt a global distribution computed from an independent set of users, to...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Dec 2011

    Iris Liveness Detection Based on Quality Related Features

    A new liveness detection scheme for iris based on quality related measures is presented. The novel anti-spoofing technique is tested on a database comprising over 1,600 real and fake (high quality printed images) iris samples proving to have a very high potential as an effective protection scheme against direct attacks....

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jul 2011

    Predicting Iris Vulnerability to Direct Attacks Based on Quality Related Features

    A new vulnerability prediction scheme for direct attacks to iris recognition systems is presented. The objective of the novel technique, based on a 22 quality related parameterization, is to discriminate beforehand between real samples which are easy to spoof and those more resistant to this type of threat. The system...

    Provided By Universidad Autonoma de Madrid

  • White Papers // May 2010

    Towards a Better Understanding of the Performance of Latent Fingerprint Recognition in Realistic Forensic Conditions

    This paper studies the performance of a state-of-the-art fingerprint recognition technology, in several practical scenarios of interest in forensic casework. First, the differences in performance between manual and automatic minutiae extraction for latent fingerprints are presented. Then, automatic minutiae extraction is analyzed using three different types of fingerprints: latent, rolled...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Apr 2010

    Scenario-Based Score Fusion for Face Recognition at a Distance

    The effect of different acquisition distances on the performance of face verification is studied. In particular, the authors evaluate two standard approaches using popular features (DCT and PCA) and matchers (GMM and SVM) under variation in the acquisition distance, as well as their score-level combination. The DCT-GMM-based system is found...

    Provided By Universidad Autonoma de Madrid

  • White Papers // May 2009

    Millimeter-And Submillimeter-Wave Imaging Technologies for Biometric Purposes

    The inherent restrictions of human body images acquired at visible spectrum hinder the performance of person recognition systems built using that kind of information (e.g. scene artifacts under varying illumination conditions). One promising approach for dealing with those limitations is using images acquired out of the visible spectrum. This paper...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jan 2009

    Synthetic Generation of Handwritten Signatures Based on Spectral Analysis

    A new method to generate synthetic online signatures is presented. The algorithm uses a parametrical model to generate the synthetic Discrete Fourier Transform (DFT) of the trajectory signals, which are then refined in the time domain and completed with a synthetic pressure function. Multiple samples of each signature are created...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jan 2009

    Improving the Enrollment in Dynamic Signature Verification With Synthetic Samples

    A novel scheme to generate multiple synthetic samples from a real on-line handwritten signature is proposed. The algorithm models a transmission channel which introduces a certain distortion into the real signature to produce the different synthetic samples. The method is used to increase the amount of data of the clients...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jan 2011

    Social Networks And Trade Of Services: Modeling Interregional Tourism Flows

    Recent literature on border effects has fostered research on informal barriers to trade and the role played by network dependencies. In relation to social networks, it has been shown that intensity of trade in goods is positively correlated with migration flows between pairs of countries/regions. In this paper the authors...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jun 2009

    Trade Openness, Institutional Change And Economic Growth

    This paper explores the relationship between trade openness and economic growth through a change in institutions. To do so, the paper creates a theory of endogenous institutional change where there are three social groups; each one owns a specific production factor. An ellite (landowners) controlling the political power fix higher...

    Provided By Universidad Autonoma de Madrid

  • White Papers // Jun 2008

    The Evolution Of The Labor Market and Leisure Industries In Spain: Quality Of Life Versus Standard Of Living

    The authors discuss the effects that the emergence of the new post-industrial form of flexible capitalist organization has on the Spanish labor market and, by extension, on the working life of two representative groups of employees characterized by their casual and stable working conditions. This brings a growing duality in...

    Provided By Universidad Autonoma de Madrid

  • White Papers // May 2008

    Recent Investments In Human Capital And Its Effect On The Chances Of Escaping From Low-Paid Jobs: The Spanish Case

    General education and training are major forces determining earnings. According to the human capital model, wage differentials among individuals over the life-cycle are largely the result of different patterns of investment in human capital. This paper is intended to analyze the effects of recent investments in human capital - general...

    Provided By Universidad Autonoma de Madrid