Thread: My EPUB Experiences
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Old 04-15-2010, 04:02 PM   #20
DaleDe
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Quote:
Originally Posted by HarryT View Post
Sorry, I didn't make myself clear.

If you put a font in an ePub file, then unless the book is DRM protected I can just change the file extension to ".zip", open the file with any ZIP program, and copy the font to my PC, where I can then use it in any way that I wish.

With a PDF file, on the other hand, the font really is embedded there inside the file, and I don't know of any way to get it out again.

Will a licence that is adequate to cover embedding a font in a PDF therefore be sufficient to cover its use with an ePub, where it's more a case of packaging the font in the file rather than making it in any way inaccessible to the user?
The font is easily obfuscated using the xor algorithm to meet the need for embedding. This should meet the licence requirements. You do not need to DRM the file. There are tools in this forum on how to obfuscate a font. The only problem is that ADE uses a slightly different method than the ePUB standard but for now the ADE one is the one everyone uses.

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