Use BooXtream 'social DRM' instead of Adobe DRM to protect ebooks. BooXtream is an easy-to-integrate RESTful web service used for watermarking and personalisation of ebooks. Supports ePub2 and ePub3 ebook file formats. The watermarking is highly redundant and invisible to the end user. The personalisation is visible in the ebook and adds a 'Ex Libris' (bookplate) with the name of the end user and several other texts and pages to the publication. Everything is customisable through an API.