-----BEGIN PGP SIGNED MESSAGE----- On Wed, 4 Sep 1996, makofi wrote:
1) If I hide some PGP encrypted data in a gif, jpg or wav file will there be any tell tale signs to the naked eye of an expert? If yes, what are they?
I don't think so. Especially for jpg which uses a lossy compression scheme. Any random noise could be attributed to the compression. There is already enough noise in wav files that inverting one bit won't make much of a difference.
3) Are there any tools at the moment to expose (not crack) the hidden encrypted data? If none. are there tools in development?
The whole point of steganography is plausible denial. The data that someone could de-stego from a file should just be random garbage, in which case there would be no way of telling whether there was an encrypted file stegoed in the data file. If PGP files are used, a utility like Stealth is a must. - -- Mark PGP encrypted mail prefered. Key fingerprint = d61734f2800486ae6f79bfeb70f95348 http://www.voicenet.com/~markm/ -----BEGIN PGP SIGNATURE----- Version: 2.6.3 Charset: noconv iQEVAwUBMi9aFCzIPc7jvyFpAQFyUggAkBekMcImimtOOtXMavb+YFj6uNLnlgKu leuX37PwQn9ROHjYBiZvhLpTWo8vn5cATI6apN0HUHW81Iy9bss67KkWY/x1tb34 qqR1KMYpEF8MexyiqKxFkOC9Zy/OcufPFIauV2TVlxPXY9m6whH8LPLV81EMYB0M kAYLGfbDkgQFEgP8prm7AAqArSL7jt80t6OQWOVJU4CebBK5P0onR+9tujhyxrdX N/GjpeW4cIdn+C3pW6bdxlwgRne9b9dAPcbEeLCOhFwnhBtO1tvg+OyKzPrmVuEh OaKBwfwSRiGbBCaGv9EXmTIxEGqFfFGioEhRwwCvKsL9JW3NZevSKg== =CuOh -----END PGP SIGNATURE-----