TY - CONF T1 - Exploiting PRNU and Linear Patterns in Forensic Camera Attribution under Complex Lens Distortion Correction T2 - ICASSP 2023 - 2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) Y1 - 2023 A1 - Montibeller, Andrea A1 - Fernando Pérez-González KW - Acoustic distortion KW - Camera Attribution KW - Camera Source Identification KW - cameras KW - forensics KW - GPU KW - Graphics processing units KW - interpolation KW - PRNU KW - Radial Distortion Correction KW - Reliability KW - Software JF - ICASSP 2023 - 2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) UR - https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10096605 ER - TY - JOUR T1 - Efficient protocols for oblivious linear function evaluation from ring-LWE JF - Journal of Computer Security Y1 - 2022 A1 - Carsten Baum A1 - Daniel Escudero A1 - Alberto Pedrouzo-Ulloa A1 - Peter Scholl A1 - Juan Ramón Troncoso-Pastoriza VL - 30 IS - 1 ER - TY - JOUR T1 - Editorial: Signal Processing for Beyond 5G Non-Terrestrial Networks JF - Frontiers in Space Technologies Y1 - 2021 A1 - Carlos Mosquera A1 - Pantelis-Daniel Arapoglou VL - 2 UR - https://www.frontiersin.org/articles/10.3389/frspt.2021.780171/full ER - TY - CONF T1 - Efficient Protocols for Oblivious Linear Function Evaluation from Ring-LWE T2 - International Conference on Security and Cryptography for Networks (SCN) Y1 - 2020 A1 - Carsten Baum A1 - Daniel Escudero A1 - Alberto Pedrouzo-Ulloa A1 - Peter Scholl A1 - Juan Ramón Troncoso-Pastoriza JF - International Conference on Security and Cryptography for Networks (SCN) PB - Springer ER - TY - CONF T1 - Energy-efficient analog beamforming with short packets in millimeter-wave MIMO systems T2 - 2020 54th Asilomar Conference on Signals, Systems, and Computers, California, 2020 Y1 - 2020 A1 - Jordi Borràs A1 - Francesc Molina A1 - R. López-Valcarce A1 - Josep Sala KW - mmWave KW - rodin AB -
The energy-aware design of fully analog precoders and combiners is investigated in this paper. To that aim, we consider a millimeter-wave short-packet communication scenario where power consumption and hardware complexity constitute relevant factors. User terminals employ a single channel encoder and, at hardware level, they implement analog architectures that combine phase shifters and switches. Additionally, transmitting terminals also leverage a power control system. An energy efficiency figure of merit is considered, and its optimization subject to finite packet-length constraints is tackled cyclically over disconnected feasible sets. Numerical results are reported
firstly, to illustrate the advantages of the proposed short-packet fully analog design, secondly, to compare its performance to that of on-off beamforming, and finally, to discuss the optimality of the proposed optimization algorithm.
JF - 2020 54th Asilomar Conference on Signals, Systems, and Computers, California, 2020 CY - Virtual event ER - TY - CONF T1 - Efficient PRNU Matching in the Encrypted Domain T2 - XoveTIC Y1 - 2019 A1 - Alberto Pedrouzo-Ulloa A1 - Miguel Masciopinto A1 - Juan Ramón Troncoso-Pastoriza A1 - Fernando Pérez-González KW - camera attribution forensic analyzer KW - digital media forensics KW - lattice-based cryptosystems KW - Photoresponse Non-Uniformity JF - XoveTIC PB - MDPI CY - A Coruña, Spain ER - TY - CHAP T1 - Expectation–maximisation based distributed estimation in sensor networks T2 - Data Fusion in Wireless Sensor Networks: A statistical signal processing perspective Y1 - 2019 A1 - R. López-Valcarce A1 - Alba Pagès-Zamora KW - winter KW - wsn AB -

Estimating the unknown parameters of a statistical model based on the observations collected by a sensor network is an important problem with application in multiple fields. In this setting, distributed processing, by which computations are carried out within the network in order to avoid raw data transmission to a fusion centre, is a desirable feature resulting in improved robustness and energy savings. In the presence of incomplete data, the expectation-maximisation (EM) algorithm is a popular means to iteratively compute the maximum likelihood (ML) estimate. It has found application in diverse fields such as computational biology, anomaly detection, speech segmentation, reinforcement learning, and motion estimation, among others. In this chapter we will review the formulation of the centralised EM estimation algorithm as a starting point and then discuss distributed versions well suited for implementation in sensor networks. The first class of these distributed versions requires specialised routing through the network in terms of a linear or circular path visiting all nodes, whereas the second class does away with this requirement by using the concept of network consensus to diffuse information through the network. Our focus will be on a relevant sensor network application, in which the parameter of a linear model is to be estimated in the presence of an unknown number of randomly malfunctioning sensors.

JF - Data Fusion in Wireless Sensor Networks: A statistical signal processing perspective PB - The Institution of Engineering and Technology (IET) CY - London, UK SN - 978-1-78561-584-9 ER - TY - CONF T1 - Exploratory Analysis of Superposition Coding and Rate Splitting for Multibeam Satellite Systems T2 - 15th International Symposium on Wireless Communication Systems (ISWCS) Y1 - 2018 A1 - Màrius Caus A1 - Adriano Pastore A1 - Mònica Navarro A1 - Tomás Ramírez A1 - Carlos Mosquera A1 - Nele Noels A1 - Nader Alagha A1 - Ana I. Perez-Neira JF - 15th International Symposium on Wireless Communication Systems (ISWCS) CY - Lisbon, Portugal ER - TY - CONF T1 - Estimating millimeter wave channels using out-of-band measurements T2 - Information Theory and Applications Workshop (ITA Y1 - 2016 A1 - Anum Ali A1 - Nuria González-Prelcic A1 - R.W. Heath Jr. KW - compass KW - mmWave JF - Information Theory and Applications Workshop (ITA ER - TY - THES T1 - Estimation, Detection, and Learning for Dynamic Spectrum Access Y1 - 2015 A1 - Daniel Romero KW - cognitive radio KW - compass KW - dynacs KW - wsn PB - University of Vigo CY - Vigo, Spain VL - Ph.D. ER - TY - CONF T1 - On the Effect of Echoes in Hybrid Terrestrial-Satellite Single Frequency Networks: Analysis and Countermeasures T2 - 2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC) (ASMS/SPSC 2012) Y1 - 2012 A1 - Alberto Rico-Alvariño A1 - C. Mosquera KW - dynacs KW - Effective SNR KW - Hybrid Terrestrial- Satellite KW - satcom KW - Satellite OFDM KW - Single Frequency Network KW - Space-Time Coding AB -

Hybrid Terrestrial Satellite Single Frequency Networks achieve large spectral efficiencies due to a higher frequency reuse, which is attained by transmitting the same waveform in the same frequency band from satellite and terrestrial transmitters. However, the presence of multiple transmitters propitiates the existence of the so-called SFN echoes, which can degrade the system performance even if they arrive within the OFDM guard interval. In this paper we characterize this effect by resorting to PER prediction metrics (or effective SNR metrics), and analyze two simple preprocessing schemes that mitigate this degradation: the use of Alamouti space-time codes, and a convenient prefiltering at the terrestrial transmitter.

JF - 2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC) (ASMS/SPSC 2012) CY - Baiona, Spain ER - TY - THES T1 - Encrypted Domain Processing for Signal Processing Applications Y1 - 2012 A1 - Juan Ramón Troncoso-Pastoriza PB - University of Vigo CY - Vigo ER - TY - CONF T1 - An Effective Metaheuristic Approach to Node Localization in Wireless Sensor Networks T2 - IEEE International Conference on Mobile Ad-hoc and Sensor Systems (MASS) Y1 - 2011 A1 - Massimo Vecchio A1 - R. López-Valcarce A1 - Francesco Marcelloni JF - IEEE International Conference on Mobile Ad-hoc and Sensor Systems (MASS) ER - TY - CONF T1 - Efficient Protocols for Secure Adaptive Filtering T2 - IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) Y1 - 2011 A1 - Juan Ramón Troncoso-Pastoriza A1 - Fernando Pérez-González KW - adaptive filtering KW - privacy KW - security KW - watermarking JF - IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) PB - IEEE CY - Prage, Czech Republic ER - TY - CONF T1 - Encrypted Domain Processing for Cloud Privacy: Concept and Practical Experience T2 - International Conference on Cloud Computing and Services Science (CLOSER) Y1 - 2011 A1 - Daniel A. Rodríguez-Silva A1 - F. Javier González-Castaño A1 - Lilian Adkinson-Orellana A1 - Alexandre Fernández-Cordeiro A1 - Juan Ramón Troncoso-Pastoriza A1 - Daniel González-Martínez KW - cloud KW - privacy KW - security KW - watermarking JF - International Conference on Cloud Computing and Services Science (CLOSER) CY - Noordwijkerhout, The Netherlands ER - TY - CONF T1 - Exposing original and duplicated regions using SIFT features and resampling traces T2 - International Workshop on Digital Watermarking (IWDW) Y1 - 2011 A1 - David Vázquez-Padín A1 - Fernando Pérez-González KW - Image forensics KW - region duplication KW - resampling estimation KW - SIFT AB -

A common type of digital image forgery is the duplication of a region in the same image to conceal something in a captured scene. The detection of region duplication forgeries has been recently addressed using methods based on SIFT features that provide points of the regions involved in the tampering and also the parameters of the geometric transformation between both regions. However, considering this output, there is not yet any information about which of the regions are originals and which are the duplicated ones. A reliable image forensic analysis must provide this information. In this paper, we propose to use a resampling-based method to provide an accurate way to distinguish the original and the tampered regions by analizing the resampling factor of each area. Comparative results are presented to evaluate the performance of the combination of both methods.

 

JF - International Workshop on Digital Watermarking (IWDW) PB - Springer Berlin Heidelberg CY - Atlantic City, USA ER - TY - JOUR T1 - Efficient Dynamic Spectrum Sharing in Cognitive Radio Networks: Centralized Dynamic Spectrum Leasing (C-DSL) JF - IEEE Transactions on Wireless Communications Y1 - 2010 A1 - Kamrul Hakim A1 - Sudhaman K. Jayaweera A1 - Georges El-Howayek A1 - C. Mosquera VL - 9 ER - TY - CONF T1 - EM decoding of Tardos traitor tracing codes T2 - ACM Workshop on Multimedia and Security (MMSEC) Y1 - 2009 A1 - Teddy Furon A1 - Luis Pérez-Freire KW - collusion channel KW - Expectation-Maximization KW - iterative decoding KW - Tardos code KW - Traitor tracing KW - watermarking JF - ACM Workshop on Multimedia and Security (MMSEC) CY - Princeton, NJ, USA ER - TY - CONF T1 - Estimating the minimal length of Tardos code T2 - International Workshop on Information Hiding (IH) Y1 - 2009 A1 - Teddy Furon A1 - Luis Pérez-Freire A1 - Arnaud Guyader A1 - Frédéric Cérou KW - Fingerprinting KW - Rare event KW - Tardos code KW - Traitor tracing KW - watermarking JF - International Workshop on Information Hiding (IH) T3 - Lecture Notes in Computer Science CY - Darmstadt, Germany ER - TY - CONF T1 - AN EXTENDED ANALYSIS OF DISCRETE FOURIER TRANFORM - RATIONAL DITHER MODULATION FOR NON-WHITE HOSTS T2 - IEEE International Workshop on Information Forensics and Security (WIFS) Y1 - 2009 A1 - Scagliola, Michele A1 - Fernando Pérez-González A1 - Guccione, Pietro KW - data hiding KW - dither modulation KW - filtering KW - non-white Gaussian hosts KW - watermarking JF - IEEE International Workshop on Information Forensics and Security (WIFS) PB - IEEE CY - London, U.K. ER - TY - CONF T1 - Entangled Kalman Filters for Cooperative Estimation T2 - IEEE Sensor Array and Multichannel Signal Processing Workshop Y1 - 2008 A1 - C. Mosquera A1 - Sudhaman K. Jayaweera KW - distributed estimation KW - sensor network JF - IEEE Sensor Array and Multichannel Signal Processing Workshop CY - Darmstadt (Germany) ER - TY - CONF T1 - Efficient Non-Interactive Zero-Knowledge Watermark Detector Robust to Sensitivity Attacks T2 - Security, Steganography, and Watermarking of Multimedia Contents Y1 - 2007 A1 - Juan Ramón Troncoso-Pastoriza A1 - Fernando Pérez-González ED - Edward J. Delp ED - Ping W. Wong KW - data-hiding KW - sensitivity KW - watermarking KW - zero-knowledge JF - Security, Steganography, and Watermarking of Multimedia Contents T3 - Proc. of SPIE PB - SPIE CY - San Jose, California, USA ER - TY - JOUR T1 - Efficient Zero-Knowledge Watermark Detection with Improved Robustness to Sensitivity Attacks JF - EURASIP Journal on Information Security Y1 - 2007 A1 - Juan Ramón Troncoso-Pastoriza A1 - Fernando Pérez-González KW - data-hiding KW - sensitivity KW - watermarking KW - zero-knowledge N1 - Special Issue on Signal Processing in the Encrypted Domain ER - TY - CONF T1 - Exploiting security holes in lattice data hiding T2 - International Workshop on Information Hiding (IH) Y1 - 2007 A1 - Luis Pérez-Freire A1 - Fernando Pérez-González KW - data-hiding KW - security KW - watermarking JF - International Workshop on Information Hiding (IH) T3 - Lecture Notes in Computer Science PB - Springer-Verlag Heidelberg CY - Saint-Malo, France ER - TY - CONF T1 - Ensuring Gain Invariance in High-Rate Data-Hiding T2 - Security, Steganography, and Watermarking of Multimedia Contents Y1 - 2005 A1 - Fernando Pérez-González A1 - C. Mosquera A1 - Mauro Barni A1 - Andrea Abrardo ED - Edward J. Delp ED - Ping W. Wong KW - data-hiding KW - watermarking JF - Security, Steganography, and Watermarking of Multimedia Contents T3 - Proc. of SPIE PB - SPIE CY - San Jose, California, USA VL - 5306 ER - TY - JOUR T1 - Estimation of road vehicle speed using two omnidirectional microphones: a maximum likelihood approach JF - EURASIP Journal of Applied Signal Processing Y1 - 2004 A1 - R. López-Valcarce A1 - C. Mosquera A1 - Fernando Pérez-González KW - microphone arrays KW - speed estimation KW - traffic monitoring VL - 2004 ER - TY - JOUR T1 - Efficient Reinitialization of the Prewhitened Constant Modulus Algorithm JF - IEEE Communications Letters Y1 - 2001 A1 - R. López-Valcarce A1 - Fernando Pérez-González KW - constant modulus KW - Digital Communications KW - equalization VL - 5 ER - TY - JOUR T1 - Equalization and interference cancellation in linear multiuser systems based on second-order statistics JF - IEEE Transactions on Signal Processing Y1 - 2001 A1 - R. López-Valcarce A1 - Zhi Ding A1 - Soura Dasgupta KW - Digital Communications KW - equalization KW - second-order statistics VL - 49 ER - TY - JOUR T1 - Exponential asymptotic stability of time-varying inverse prediction error filters JF - IEEE Transactions on Signal Processing Y1 - 2000 A1 - R. López-Valcarce A1 - Soura Dasgupta A1 - Roberto Tempo A1 - Minyue Fu KW - nonstationary processes KW - prediction error filters KW - stability VL - 48 ER -