Gestión digital de derechos (a veces escrito también gestión de derechos digitales) o DRM (sigla en inglés de digital rights management) es un término genérico que se refiere a las tecnologías de control de acceso usadas por editoriales y titulares de derechos de autor para limitar el uso de medios o dispositivos digitales. También se utiliza para referir a las restricciones asociadas a instancias específicas de obras digitales o dispositivos. Los DRM se solapan, hasta cierto punto, con la protección de copia de software, aunque el término DRM es generalmente aplicado a medios creativos (música, películas, etc.).

El DRM ha sido y está siendo utilizado por compañías proveedoras de contenidos como Sony, Microsoft, Valve y la BBC. Apple Inc. renunció al uso de DRM en las canciones ofrecidas a través de su portal iTunes,1 que concentra el 80% de ventas de música on-line.

El uso de DRM es polémico. Los que abogan a favor de su utilización argumentan que es necesario, para los poseedores de derechos de autor, prevenir la duplicación sin autorización de sus obras y así asegurar flujos continuos de ingresos.2 Sus detractores, como la Free Software Foundation, sostienen por su parte que el uso de la palabra rights (derechos) es engañosa y sugieren que en su lugar se use el término Digital Restrictions Management (gestión de restricciones digitales). Su posición es esencialmente que los poseedores de derechos de autor intentan restringir el uso de material con copyright incluso en formas no cubiertas por las leyes existentes.3 La Electronic Frontier Foundation; otros consideran también que los DRM son prácticas anticompetitivas.

En la práctica, todos los sistemas de DRM usados ampliamente han sido derrotados o eludidos cuando han sido desplegados a suficientes consumidores.5 El restringir la copia de material audiovisual es especialmente difícil debido a la existencia del agujero analógico, e incluso se sugiere que un DRM eficaz es lógicamente imposible por esta razón.

Fuente: Wikipedia

DRM is often written as “Digital Rights Management”, but this is misleading, since it refers to systems that are designed to take away and limit your rights. So, we suggest you use the term “Digital Restrictions Management” instead. We also suggest “Treacherous Computing” as a replacement for the misleading “Trusted Computing”.

• DefectiveByDesign.org, FSF campaign to eliminate DRM
• Opposing Digital Rights Mismanagement, an interview of Richard Stallman by BusinessWeek Online about DRM
• Boycott Blu-Ray
• Reaction to the DRM clause in GPLv3, blog entry by David “novalis” Turner
• Free software without the freedom?, blog entry by John Sullivan about DRM
• A letter to the Boston Public Library from Richard Stallman condemning their use of DRM for public library audio books.

Fuente: Free Software Foundation

DeDRM plugin for calibre: the simplest option for removing DRM from most ebooks

The DRM removal plugin (DeDRM_plugin.zip) can be found in the tools archive linked from the most recent post in this blog. The DeDRM plugin can remove DRM from Kindle eBooks (but not rented Kindle ebooks, books download to a Kindle Fire or Fire HD, Kindle for Android, Kindle for iOS or the Windows 8 AppStore Kindle App), Barnes & Noble ePub ebooks, any ebooks using Adobe Digital Editions DRM (this includes ePubs from Kobo and Sony that are downloaded for Adobe Digital Editions), and the older Mobipocket and eReader ebooks. For other kinds of ebooks see the other posts in this blog.

Tools v6.0.8 Posted

1. Download the latest tools package, and unzip it. (On Windows, right-click and “Extract All…”; After extracting all, rename the tools_vX.X.X.zip file to tools_zipped_vX.X.X.zip to prevent later confusion)
2. Run calibre. From the Preferences menu select “Change calibre behavior”. (Do not click “Get plugins to enhance calibre”, that option is reserved for ‘official’ calibre plugins.)
3. Click on Plugins (under “Advanced”) — it looks like a jigsaw puzzle piece.
4. Click on the large “Load plugin from file” button
5. Navigate to the tools folder unzipped in step 2
6. Open the “DeDRM_calibre_plugin” folder
7. Select the DeDRM_plugin.zip file in that folder
8. Click on the “Add” (sometimes “Open”) button.
9. Click on the “Yes” button in the “Are you sure?” warning dialog that appears. A “Success” dialog will appear, saying that the plug-in has been installed. Click on “OK”.
10. Customising the plugin with encryption keys

On Macintosh and Windows systems no customisation is required for ebooks from Kindle for Mac/PC or Adobe Digital Editions (ADE), provided that calibre is run on the same computer and user account as the installation of Kindle for Mac/PC or ADE to which the books were downloaded. The default key is found and stored in the preferences automatically. Anyone using Linux should read the ReadMe file for details of how to obtain the keys manually.

For other sources of ebooks, or on Linux systems, you must configure the plugin. To configure the plugin, you must find it in the list of plugins. Usually calibre will have automatically selected the DeDRM plugin after you add it. If not, the DeDRM plugin can be found under “File Type plugins”. It might easier to find if you check the “Show only user installed plugins” checkbox. You might need to click on the triangle next to the “File Type plugins” label to show the list of File Type plugins.

If it’s not already selected, click on the DeDRM plugin in the list to select it, and then click on the Customize plugin button. This will open that main “Customise DeDRM” dialog which contains a set of buttons describing different type and sources of ebooks. If you have DRMed ebooks that match the description on any of the buttons, you will need to click on the button and enter the required information in the sub-dialog that will pop up.

All the dialogs have a help link in the top right of the dialog, that gives further information about the required information.

When all the configuration for your DRMed ebooks has been entered, click “OK” in the main dialog to save all the information you’ve entered. You’re now ready to remove the DRM from your ebooks.

The DeDRM calibre plugin removes DRM from ebooks as they are imported into calibre. So to use the plugin, just import your DRMed ebooks into calibre, and the DRM will be removed. If you have already imported your ebooks into calibre, you will need to remove the DRMed ebooks and import them again.

You can check that the DRM has been removed from an imported ebook by trying to view it using calibre’s built-in viewer. Note that for .azw3 Kindle ebooks you might need to check a checkbox in calibre’s preferences to say that .azw3 ebooks should be viewed using calibre’s internal viewer.

Ebook Formats, DRM and You — A Guide for the Perplexed