PDF Font Specimen Security

jim's picture

I want to make some pdf font samples available on my web site, but I'm concerned about security. I've heard that the fonts can be extracted from pdfs. Is this true? Is there a way to protect against it? I've asked a few friends and got a few different answers...all ending with, "I'm not really sure."
Any advice would be welcome. If this has already been discussed and I wasn't paying attention, maybe someone could steer me to the thread.

thanks.

jim

hrant's picture

I've concluded that the bottom-line answer is this: it's safe enough.

Yes, anything can be hacked (and that can even be seen as consolation for using PDF:-), but the marketing advantage of PDF far outweighs the small potential "leak" - and don't forget that people who buy your fonts won't always keep them to themselves anyway - so PDF or no there will be some piracy.

As proof of sorts, note the number of high-end font houses that give out PDFs now: Adobe, FontBureau, virtually everybody. Also, there are ways of making PDFs even more secure, but I don't know much about that myself.

hhp

John Hudson's picture

Metrics are not lost when a font is extracted from a PDF, but kerning is.

Si_Daniels's picture

Jim,

What does your EULA say about embedding, and what permissions do you set in your fonts? If you tell your customers they can't embed your fonts then I'd say you shouldn't embed them yorself. If you allow embedding you don't really have anything to lose - except making life slightly easier for the hacker.

Cheers, Si

johnbutler's picture

Convert to Curves,
Convert to Curves,
Why nobody doin da Convert to Curves...

(cue Fat Boys Human Beat Box accompaniment)

matt_desmond's picture

The only two things about converting to curves is that it makes the on-screen view pixelated (When is Adobe going to fix that? Can they?) and it makes the file size bigger.

Thomas Phinney's picture

There's a view option in Acrobat called "smooth line art" that antialiases vector art. However even so, the on-screen display of fonts converted to curves isn't as good as of real fonts (for reasons we've discussed at painful length elsewhere).

Cheers,

T

matt_desmond's picture

Thanks for enlightening me to that view option in Acrobat, Thomas. I learn something new every day.

Chris Rugen's picture

I'm curious about this myself. I have enlightened many clients about this feature over the last year, because it isn't a default.

Thomas Phinney's picture

Even if it becomes a default in the next version of Acrobat, you'll have clients using older versions of Reader for many years to come.

That being said, the reasons it hasn't been a default yet are:

1) Performance issues, especially on older machines or with particular docs with elaborate vector art.

2) In some documents at some zoom levels, it can sometimes cause undesirable visual artifacts. Mostly with abutting areas of fill, sometimes involving transparency. We're trying to reduce that problem.

T

Stephen Coles's picture

Jim - I agree with Hrant. The benefits far outweigh the relatively
minor risks. As far as I understand, it requires considerable
labor to hack a single font out of a PDF, and the result is much
less than the original - metrics are lost.

Joe Pemberton's picture

Go for it Jim.

Stephen Coles's picture

Thanks John. My mistake.

Stephen Coles's picture

Thomas: There's a view option in Acrobat called "smooth line art" that antialiases vector art.

The question is: When will Adobe turn that option on by default?

Syndicate content Syndicate content