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.st edition 2021-03 Information technology — Specification of DRM technology for digital publications — Part 3: Device key-based protection Technologies de l'information — Spécification de la technologie de gestion des droits numériques (DRM) pour les publications numériques — Partie 3: Protection par clé matériel Reference number ISO/IEC TS 23078-3:2021(E) ？ ISO/IEC 2021 ISO/IEC TS 23078-3:202