Originally Posted by pdurrant
Ah. But see the flaw? Convert ePub to azw3 and then azw3 to ePub, and the obfuscation is gone. Naughty calibre!
You mean as opposed to viewing the epub with the viewer and then copying the unobfuscated fonts out of the temp files? Or running an epub to epub conversion with the debug pipeline option and copying the font files out of the debug directory. Obfuscation is a joke, and a pretty poor one at that. So while I will take reasonable steps to preserve obfuscation, there are limits to how many hoops I am willing to jump through.