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#drm

5 posts4 participants0 posts today

🆕 blog! “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…

👀 Read more: shkspr.mobi/blog/2025/03/towar

#debugging #drm #ebooks #epub

Chrome debug screen.
Terence Eden’s Blog · Extracting content from an LCP "protected" ePub
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Replied in thread

@foone

There is some #DRM deeply embedded into windows.

Ive never investigated it fully, but screen caps of media often yield black screen.

I suspect it's on a video driver level.

Don't know.
Don't care.
Use #Linux for prod now.
Widows is just for games now.

"While books that come on audio CDs don't have DRM embedded in them, files downloaded from Audible or other for-pay sources often do. Audiobookshelf won't play books with DRM, which means you need a method of stripping that DRM out.

Unfortunately, here's where we run into a problem: removing DRM from your audiobooks is not universally legal. "In the US, the law against 'circumventing' effective DRM has no personal-use exemption. In Europe, it varies by country," explained the Electronic Frontier Foundation's Competition and IP Litigation Director Mitch Stoltz when Ars reached out for advice. "That's as silly as it sounds—stripping DRM from one’s own copy of an audiobook in order to listen to it privately through different software doesn’t threaten the author or publisher, except that it makes it harder for them to charge you twice for the same audiobook. It’s another example of how anti-circumvention laws interfere with consumers’ rights of ownership over the things they buy."

And that means you're kind of on your own for this step. Should you live in a jurisdiction where DRM removal from audiobooks for personal use is legal—which includes some but not all European countries—then sites like this one can assist in the process; for the rest of us, the only advice I can give is to simply proceed in a legal manner and use DRM-free audiobooks to start with."

arstechnica.com/gadgets/2025/0

Screenshot of Lee's library
Ars Technica · I threw away Audible’s app, and now I self-host my audiobooksBy Lee Hutchinson

🆕 blog! “Some thoughts on LCP eBook DRM”

There's a new(ish) DRM scheme in town! LCP is Readium's "Licensed Content Protection".

At the risk of sounding like an utter corporate stooge, I think it is a relatively inoffensive and technically interesting DRM scheme. Primarily because, once you've downloaded your DRM-infected book, you don't need to rely on an online server to unlock…

👀 Read more: shkspr.mobi/blog/2025/03/some-

#drm #ebook #ereader

The Readium logo.
Terence Eden’s Blog · Some thoughts on LCP eBook DRM
More from Terence Eden
Continued thread

A fruitless day looking at #LCP reverse engineering. There are a couple of Android and Linux apps which look hopeful.
Can be decompiled trivially to get the necessary blobs.

But, sadly, my skills don't extend to much more than a surface level analysis.

That said, it looks like the Readium #DRM is reasonably inoffensive. Once you have the file you can back it up and move it anywhere - you just need the password to open it. No network connection needed.