The current version of adobe Digital Editions still doesn't support the
IDPF standard way of encrypting fonts embedded in an ePub. Instead it supports Adobe's own non-standard method.
The question I'd like answered is "Does the iPad's ePub reader support IDPF encrypted fonts?" It would also be interesting to know "Does the iPad's ePub reader support Adobe encrypted fonts?"
So, I attach two sample ePubs, one with IDPF encrypted fonts, and one with Adobe encrypted fonts. Could someone with an iPad download the sample ePub and give it a go? Thanks.
If the embedded fonts work, the title page will look something like the attached image.
Hopefully it'll work! If it doesn't, it might be my encoding, or it might be that it's not supported...