2025
Conference
Secure and Privacy-Preserving Load Forecasting in Smart Grids Through Blockchain-Based Incentives
NSS 20025
J. Ferré-Queralt, J. Castellà-Roca and A. Viejo
Alexandre Viejo
Full Professor
Tel: +34 977 55 8270
Email: alexandre.viejo@urv.cat
Research Lines
Cybersecurity
Distributed Systems Security
Secure Data Management
Data Privacy
Cryptographic Privacy Techniques
Academic Profiles
Publications
View all →
2025
Journal
D1
From Panoptic to Secure and Privacy-Preserving Lateral Surveillance in Vehicle Restricted Areas
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
C. Anglés-Tafalla, A. Viejo, R. Trujillo-Rasua, and J. Castellà-Roca
2025
Conference
Blockchain-Enhanced User Consent for GDPR-Compliant Real-Time Bidding
DBSEC’25
C. Daudén-Esmel, J. Castellà-Roca, A. Viejo and V. Torra
2025
Journal
Q1
Blockchain-based hierarchical smart contracts to prevent user profiling in decentralized energy trading systems
SUSTAINABLE ENERGY, GRIDS AND NETWORKS
J. Ferré-Queralt, J. Castellà-Roca and A. Viejo
2025
Journal
Q1
Multi-Platform Wallet for Privacy Protection and Key Recovery in Decentralized Applications
BLOCKCHAIN-RESEARCH AND APPLICATIONS
C. Daudén-Esmel, J. Castellà-Roca, A. Viejo, I. M. Rodríguez
2024
Conference
Identifying digital certificate revocation using Bitcoin
RECSI 2024
C. Daudén-Esmel, J. Castellà-Roca, A. Viejo and J. Herrera-Joancomartí
2024
Conference
Privacidad en Smart Grid mediante Smart Contracts y agregacion de datos
RECSI 2024
J. Ferré-Queralt, C. Anglés-Tafalla, J. Salas, G. Navarro-Arribas, A. Viejo, D. Megías and J. Castellà-Roca
2024
Conference
Leveraging a Smart Grid Framework for Interoperability with a Distributed Ecosystem
RECSI 2024
J. Ferré-Queralt, F. Kabir, D. Megías, A. Viejo and J. Castellà-Roca
2024
Conference
Uso de Smart Contracts e IPFS para la Gestión Segura de Datos de Acceso a Zonas Restringidas Vehiculares
RECSI 2024
C. Anglés-Tafalla, A. Viejo and J. Castellà-Roca
2024
Conference
Decentralized and Privacy-Preserving Digital Identities with Verifiable Credentials and Revocable Anonymity
MDAI2024
J. Ferré-Queralt, J. Castellà-Roca and A. Viejo
2024
Journal
Blockchain-based access control system for efficient and GDPR-compliant personal data management
COMPUTER COMMUNICATIONS
C. Daudén-Esmel, J. Castellà-Roca and A. Viejo
2023
Conference
Smart Contracts for a Secure and Privacy-Preserving Smart Grid
18TH INTERNATIONAL CONFERENCE ON RISKS AND SECURITY OF INTERNET AND SYSTEMS
J. Ferré-Queralt, J. Castellà-Roca and A. Viejo
2023
Conference
PrivacySmart: Automatic and Transparent Management of Privacy Policies
DPM2023
C. Dauden-Esmel, J. Castellà-Roca, A. Viejo and E. J. Bel-Ribes
2023
Journal
D1
Security and Privacy in a Blockchain-Powered Access Control System for Low Emission Zones
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
C. Anglés-Tafalla, A. Viejo, J. Castellà-Roca, M. Mut-Puigserver and M. M. Payeras-Capellà
2022
Conference
Seguridad y Privacidad en un Sistema de Control de Acceso Distribuido para Zonas de Bajas Emisiones
RECSI 2022
C. Anglés-Tafalla, J. Castellà-Roca and A. Viejo
2022
Conference
Sistema para la gestión automática de las políticas de privacidad y uso de las cookies
RECSI 2022
C. Daudén-Esmel, J. Castellà-Roca and A. Viejo
2021
Journal
Privacy protection of user profiles in online search via semantic randomization
KNOWLEDGE AND INFORMATION SYSTEMS
M. Rodríguez-García, M. Batet, D. Sánchez and A. Viejo
2021
Conference
Control de Acceso Anonimo para Zonas de Bajas Emisiones basado en Smart Contracts
RECSI 2020
C. Anglès-Tafalla, J. Castellà-Roca and A. Viejo
2021
Journal
Automatic Assessment of Privacy Policies under the GDPR
APPLIED SCIENCES
D. Sánchez, A. Viejo and M. Batet
2021
Conference
Lightweight blockchain-based platform for GDPR-compliance personal data management
CSP 2021
C. Daudén-Esmel, J. Castellà-Roca, A.Viejo and J. Domingo-Ferrer
2020
Journal
D1
Secure monitoring in IoT-based services via fog orchestration
FUTURE GENERATION COMPUTER SYSTEMS
A. Viejo and D. Sánchez
2019
Conference
Decentralized privacy-preserving access for low emission zones
SECRYPT 2019
C. Anglès-Tafalla, S. Ricci, P. Dzurenda, J. Hajny, J. Castellà-Roca, and A. Viejo
2019
Conference
Privacy-Preserving and Secure Decentralized Access Control System for Low Emission Zones
IEEE CONFERENCE ON COMPUTER COMMUNICATIONS
C. Angles-Tafalla. J. Castellà-Roca and A. Viejo
2019
Journal
Q1
Secure and privacy-preserving orchestration and delivery of fog-enabled IoT services
AD HOC NETWORKS
A. Viejo and D. Sánchez
2018
Journal
Q1
Secure and privacy-preserving lightweight access control system for low emission zones
COMPUTER NETWORKS
J. Castellà-Roca, M. Mut-Puigserver, M. M. Payeras-Capella, A. Viejo, and C. Anglès-Tafalla
2018
Journal
Privacy-preserving and advertising-friendly web surfing
COMPUTER COMMUNICATIONS
D. Sánchez and A. Viejo
2018
Journal
Privacy-Preserving Orchestrated Web Service Composition with Untrusted Brokers
INTERNATIONAL JOURNAL OF INFORMATION TECHNOLOGY AND WEB ENGINEERING
I. Khabou, M. Rouached, A. Viejo and D. Sánchez
2018
Journal
D1
A semantic-preserving differentially private method for releasing query logs
INFORMATION SCIENCES
D. Sánchez, M. Batet, A. Viejo, M. Rodriguez-Garcia and J. Castellà-Roca
2018
Conference
Pruebas Basadas en el Entorno para la Detección de Ataques de Relay en Accesos a Zonas Restringidas
RECSI 2018
C. Anglés-Tafalla, J. Castellà-Roca, A. Viejo, M.M. Payeras Capellà, M. Mut Puigserver
2018
Conference
Key Management System for Private Car-Sharing Scenarios
CAVS18
A. C. Hernández Gómez, J. Castellà-Roca and A. Viejo