MobileRead Forums - View Single Post - LCP DRM

edent · 03-16-2025, 08:37 AM

I think I've discovered a way to extract files from an ePub or PDF which has LCP Profile 2.0.

This research is a proof-of-concept. It requires Linux and is not automated. This doesn't reverse engineer the encryption or reveal the cryptographic keys.

While this works on my machine, I don't know how generally useful it is.

My blog post is at https://shkspr.mobi/blog/2025/03/tow...rotected-epub/

03-16-2025, 08:37 AM	#1
edent Connoisseur Posts: 51 Karma: 94224 Join Date: Dec 2009 Location: UK Device: Likebook Ares, Kindle 3G, Nook STR, 511eb	LCP DRM - Extracting Files I think I've discovered a way to extract files from an ePub or PDF which has LCP Profile 2.0. This research is a proof-of-concept. It requires Linux and is not automated. This doesn't reverse engineer the encryption or reveal the cryptographic keys. While this works on my machine, I don't know how generally useful it is. My blog post is at https://shkspr.mobi/blog/2025/03/tow...rotected-epub/