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Extracting content from an LCP “protected” ePub

As Cory Doctorow once said "Any time that someone puts a lock on something that belongs to you but won't give you the key, that lock's not there for you." But here's the thing with the LCP DRM scheme; they do give you the key! As I've written about previously, LCP mostly relies on the user entering their password (the key) when they want to read the book. Oh, there's some deep cryptographic magic in the background but, ultimately, the key is sat on your computer waiting to be found. Of…

You will now be able to see the names of all the files - images, css, fonts, text, etc - but their contents will be encrypted, so you can't open them. Shortly afterwards, I received a LinkedIn message from someone senior in the Readium consortium - the body which has created the LCP DRM. Too bad; disturbances around LCP will force us to focus on a new round of security measures, ensuring the technology stays useful for ebook lending (stop reading after some time) and as a protection against oversharing.

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