On Sat, May 30, 2009 at 12:14:14PM -0600, David Green wrote:
> On 2009-May-30, at 12:06 pm, David Green wrote:
> >...what "Perl6" is today, let alone what it will be tomorrow.
> Actually, we do kind of know what Perl will look like a decade from
> now, because P6 is deliberately extensible enough that we may never
> need a Perl 7. But that simply means that holiday photos are already
> a possibility:
> perl -MSteganography::Images pics/2009/ceylon.jpg
> In fact, you could do that in Perl 5....
Storing things in PNGs has already been done, badly, by
Well, badly as far as the "hiding" bit goes. The effectiveness of the Floyd-
Steinberg dithering actually surprised me.
There's "real" software to do real steganography within JPEGs, that I think
stated that it managed to use up to 1 bit in 9 without being obvious. I think
that you'd have to understand the JPEG file format to make it work
effectively, and I didn't need to do that to prove my point.
(Which was that a photo sharing site with no file quota was not a good idea as
it could be abused by third parties to completely externalise their file
Mmm, I realise that this also means that I've had a JPEG file on CPAN for
4 years now, and no-one has commented :-)