ADOPTED_FROM:ISO/IEC TS 23078-3:2021 This document defines a technical solution for encrypting resources of EPUB publications, effectively registering a device certificate to providers and securely delivering decryption keys to reading systems included in licenses tailored to specific devices. This technical solution uses the passphrase-based authentication method defined in ISO/IEC TS 23078-2 for reading systems to receive the license and access the encrypted resources of such digital publications.