3 ms·

(OP here) I discussed how the DRM works in an earlier blog post - https://shkspr.mobi/blog/2025/03/some-thoughts-on-lcp-ebook-drm/ https://shkspr.mobi/blog/2025

by edent 2y ago

(OP here) I discussed how the DRM works in an earlier blog post - https://shkspr.mobi/blog/2025/03/some-thoughts-on-lcp-ebook-drm/ https://shkspr.mobi/blog/2025/03/some-thoughts-on-lcp-ebook-... Essentially, the key for decrypting the files is made up of the book owner's passphrase and the super-secret key embedded in the closed-source binary. I wasn't able to reverse engineer the binary or extract that key.

deleted 2y ago
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deleted 2y ago
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ShrimpHawk 2y ago
The key is b3a07c4d42880e69398e05392405050efeea0664c0b638b7c986556fa9b58d77b31a40eb6a4fdba1e4537229d9f779daad1cc41ee968153cb71f27dc9696d40f
- edent 2y ago
  No, it isn't. That's the key for LCP Profile 1.0 - which was deprecated some time ago - https://readium.org/lcp-specs/notes/lcp-profile-upgrade.html https://readium.org/lcp-specs/notes/lcp-profile-upgrade.html