This book constitutes the proceedings of the First International Workshop on Emerging Technologies for Authorization and Authentication, ETAA 2018, held in Barcelona, Spain, in September 2018. The 10 papers presented in this volume were carefully reviewed and selected from 16 submissions. They were organized in two parts: authentication and authorization techniques and violation detection and countermeasures.

This volume constitutes the papers of the 5th International Workshop on Emerging Technologies for Authorization and Authentication, ETAA 2022, held in Copenhagen, Denmark, on September 30, 2022. The 8 full papers presented together with one invited paper were carefully reviewed and selected from 10 submissions. They cover topics such as: new techniques for biometric and behavioralbased authentication, authentication and authorization in the IoT and in distributed systems in general, including the smart home environment.

This book constitutes the proceedings of the 4th International Workshop on Emerging Technologies for Authorization and Authentication, ETAA 2021, held in Darmstadt, Germany, on October 8, 2021. The workshop was co-located with ESORICS 2021. The 11 full papers presented in this volume were carefully reviewed and selected from 14 submissions. The workshop presents new techniques for biometric and behavioral based authentication, authentication and authorization in the IoT and in distributed systems in general, including smart home environment.

This book constitutes the proceedings of the Second International Workshop on Emerging Technologies for Authorization and Authentication, ETAA 2019, held in Luxembourg, in September 2019. The 10 full papers presented in this volume were carefully reviewed and selected from numerous submissions. They focus on new techniques for biometric and behavioral based authentication, authentication and authorization in the IoT and in distributed systems in general, techniques for strengthen password based authentication and for dissuading malicious users from stolen password reuse, an approach for discovering authentication vulnerabilities in interconnected accounts, and strategies to optimize the access control decision process in the Big Data scenario.

This book constitutes the proceedings of the Third International Workshop on Emerging Technologies for Authorization and Authentication, ETAA 2020, held in Guildford, UK, in September 2020. The 10 full papers presented in this volume were carefully reviewed and selected from 15 submissions. The conference was planned at University of Surrey, Guildford, UK. Due to COVID-19 outbreak, ESORICS conference and affiliated workshop will be held online. The workshop presents new techniques for biometric and behavioral based authentication, and authorization in the IoT and in distributed systems in general, and much more.