Re: [steghide-devel] embed info into tif,psd,eps formats.

[Stefan H. <sh...@ch...>]

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On Sunday 02 November 2003 10:43, Akash Mansukhani wrote:
> Hello All,
>
> I wanted to know whether steghide could be used to embed information in
> images having formats such as tif, psd and eps.  I know that currently
> there is support for only jpg and bmp formats.  However, I was wondering
> whether there could be a workaround here that I could use.
You can use a tif file as cover if you convert your picture.tif to
picture.bmp, then use steghide to embed data in picture.bmp resulting in
stego.bmp and then convert stego.bmp to stego.tif, e.g. using the Gimp. The
receiver then has to convert stego.tif to stego.bmp and will be able to
extract the message. However, it is necessary to use either no or lossless
compression in the stego.tif. Otherwise the receivers stego.bmp will not be
equal to the senders stego.bmp. An embedding by steghide will not survive
lossy compression such as jpeg compression.
Embedding in eps will probably not be possible because these are vector
graphics. I don't know about psd.

Greetings,
Stefan
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