Search Results for author: Alejandro Acien

Found 8 papers, 2 papers with code

BeCAPTCHA-Type: Biometric Keystroke Data Generation for Improved Bot Detection

no code implementations27 Jul 2022 Daniel DeAlcala, Aythami Morales, Ruben Tolosana, Alejandro Acien, Julian Fierrez, Santiago Hernandez, Miguel A. Ferrer, Moises Diaz

Different bot detectors are considered based on several supervised classifiers (Support Vector Machine, Random Forest, Gaussian Naive Bayes and a Long Short-Term Memory network) and a learning framework including human and synthetic samples.

Few-Shot Learning Vocal Bursts Type Prediction

Mobile Behavioral Biometrics for Passive Authentication

no code implementations14 Mar 2022 Giuseppe Stragapede, Ruben Vera-Rodriguez, Ruben Tolosana, Aythami Morales, Alejandro Acien, Gael Le Lan

Current mobile user authentication systems based on PIN codes, fingerprint, and face recognition have several shortcomings.

Face Recognition

SetMargin Loss applied to Deep Keystroke Biometrics with Circle Packing Interpretation

no code implementations2 Sep 2021 Aythami Morales, Julian Fierrez, Alejandro Acien, Ruben Tolosana, Ignacio Serna

This work presents a new deep learning approach for keystroke biometrics based on a novel Distance Metric Learning method (DML).

Metric Learning

TypeNet: Deep Learning Keystroke Biometrics

1 code implementation14 Jan 2021 Alejandro Acien, Aythami Morales, John V. Monaco, Ruben Vera-Rodriguez, Julian Fierrez

We study the performance of Long Short-Term Memory networks for keystroke biometric authentication at large scale in free-text scenarios.

BeCAPTCHA-Mouse: Synthetic Mouse Trajectories and Improved Bot Detection

2 code implementations2 May 2020 Alejandro Acien, Aythami Morales, Julian Fierrez, Ruben Vera-Rodriguez

We propose two new mouse trajectory synthesis methods for generating realistic data: a) a function-based method based on heuristic functions, and b) a data-driven method based on Generative Adversarial Networks (GANs) in which a Generator synthesizes human-like trajectories from a Gaussian noise input.

TypeNet: Scaling up Keystroke Biometrics

no code implementations7 Apr 2020 Alejandro Acien, John V. Monaco, Aythami Morales, Ruben Vera-Rodriguez, Julian Fierrez

We study the suitability of keystroke dynamics to authenticate 100K users typing free-text.

MultiLock: Mobile Active Authentication based on Multiple Biometric and Behavioral Patterns

no code implementations29 Jan 2019 Alejandro Acien, Aythami Morales, Ruben Vera-Rodriguez, Julian Fierrez

In this paper we evaluate mobile active authentication based on an ensemble of biometrics and behavior-based profiling signals.

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