Acme::Steganography::Image::Png Hide data (badly) in png images
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Perl module perl PNG steganography png images

Acme::Steganography::Image::Png Description

Hide data (badly) in png images Acme::Steganography::Image::Png is a Perl module to hide data (badly) in png images.SYNOPSIS use Acme::Steganography::Image::Png; # Write your data out as RGB PNGs hidden in the image "Camouflage.jpg" my $writer = Acme::Steganography::Image::Png::RGB::556FS->new(); $writer->data($data); my @filenames = $writer->write_images("Camouflage.jpg"); # Returns a list of the filenames it wrote to # Then read them back. my $reread = Acme::Steganography::Image::Png::RGB::556->read_files(@files);Acme::Steganography::Image::Png is extremely ineffective at hiding your secrets inside Png images.There are 4 implementationsAcme::Steganography::Image::Png::FlashingNeonSignGrey Blatantly stuffs your data into greyscale PNG files with absolutely no attempt to hide it.Acme::Steganography::Image::Png::RGB::556 Stuffs your data into a sample image, using the low order bits of each colour. 2 bytes of your data are stored in each pixel, 5 bits in Red and Green, 6 in Blue. It produces a rather grainy image.Acme::Steganography::Image::Png::RGB::323 Also stuffs your data into a sample image, using the low order bits of each colour. Only 1 byte of your data is stored in each pixel, 3 bits in Red and Blue, 2 in Green. To the untrained eye the image looks good. But the fact that it's PNG will make anyone suspicious about the contents.Acme::Steganography::Image::Png::RGB::556FS Stuffs your data into a sample image, using the low order bits of each colour. 2 bytes of your data are stored in each pixel, 5 bits in Red and Green, 6 in Blue. Changing the value of pixels to store data is adding error to the image, in this case rather a lot of error. To attempt to conceal some of the graininess Floyd-Steinberg dithering is used to spread the errors around. It's not perfect, but effects are quite interesting, producing a reasonably nice dithered image.Write your data out by calling write_imagesRead your data back in by calling read_filesYou don't have to return the filenames in the correct order. Requirements: · Perl

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