Hide4PGP Hide4PGP is a freeware program distributed as source code in ANSI C and precompiled executables for DOS (any version but 1.x - is there one outside the museum?), OS/2 (Warp and up), and the Win32 console (9x and NT). It's purpose is to hide any data in a way that the viewer or listener does not recognize any difference. This is called steganography.
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Source: NetCost & Security