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#epub

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🆕 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

Terence Eden’s Blog · Extracting content from an LCP "protected" ePub
More from Terence Eden
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And done.

I can now extract a full #ePub which was "protected" by Readium's #LCP Profile 2.0.

I haven't found a way to reverse engineer the encryption. Nor have I cracked any cryptographic keys. I haven't misused anyone's computer, nor connected to anyone else's computer and run code there.

I simply politely asked the app to give me the unencrypted files and it did so.

It is a slow, tedious, and manual process. But, crucially, it works.

Will blog it all up next week.

Replied in thread

@noblefeu also das mit Farbe ist ne Frage des Panels.

  • Bei #eInk gibt's nur wenige ACeP panels die 7 Farben können.

Wasserdichtigkeit geht notfalls per Hülle (gibt reputable Hersteller die sogar Druckwasserdichtigkeit für's Tauchen garantieren, brsucht halt buttons)...

  • Mensch muss in jedem Falle bei jedem Hersteller und Gerät einzeln nachfragen, ob diese entsprecjende Features haben.

Sowas wie "#ePub-Dateien ohne #DRM von #microSD lesen und anzeigen" sollte jeder halbwegs taugliche #eReader können. Ansonsten ist es allenfalls nen "#ThinClient für geschlossene Systeme" (vgl. #Amazon #Kindle)!

#epub#drm#microsd