Readium LCP is an open standard for a digital rights management (DRM) system for ebooks by Readium Foundation. It supports the EPUB publication format. It uses AES-256 encryption with SHA-2 hashing. It uses X.509 digital certificates. It has SDK for Swift and Kotlin.
The project got financial help from Korea Copyright Commission (KCC).
Internet Archive is lending LCP-protected ebooks. Instituto Cervantes has Spanish courses. BiblioVault serves 90 scholarly presses.