This volume constitutes the refereed proceedings of the 5th International Workshop on Emerging Technologies for Authorization and Authentication, ETAA 2022, held in Copenhagen, Denmark, on September 30, 2022, co-located with ESORICS 2022.The revised 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 behavioral based authentication, authentication and authorization in the IoT and in distributed systems in general, including the smart home environment.