10 ms·

how?

• jerrya 15y ago
  You could tar up your backup files. Download a bunch of porn, maybe of Debbie Reynolds, America's sweetheart. Use tools like these: http://www.jjtc.com/Security/stegtools.htm http://www.jjtc.com/Security/stegtools.htm to distribute your backup files throughout the porn. Visit a porn uploading site and upload your files. Wait for others to download, torrent, repost them. .... Hey I lost a file? Well, let's just google Debbie Reynolds topless. Woohoo! There's my quicken files! See this article in the wiki suggesting spammers, terrorists, the fbi do just that. http://en.wikipedia.org/wiki/Steganography#Alleged_use_by_terrorists http://en.wikipedia.org/wiki/Steganography#Alleged_use_by_te... "Lately, al-Qaeda operatives have been sending hundreds of encrypted messages that have been hidden in files on digital photographs on the auction site eBay.com I wish I had a patent on this idea from way back when, if so, I could have sued Al Qaeda out of existence.
• nsmartt 15y ago
  I have no idea if this guy is serious, (EDIT: I submitted this before I saw his response) but it's entirely possible to embed data in JPEG files via base64 + modifying exif data. It isn't really viable for large files, however, unless vastly distributed. Perl: use Image::img; my $img = new Image::img; $img->ExtractInfo('image.jpg'); #$img->SetNewValue("UserComment", $yourdata); #$img->SetNewValue("Comment", $yourdata); $img->WriteInfo('image.jpg');
  • hoop 15y ago
    You don't need to use exif data. Many tools use the often ignored alpha channel of each pixel. In this case, you have X x Y bytes of available storage where X and Y are the width and height of the image.
    • baddox 15y ago
      For lossless images, you could also use the least significant bit of each color channel of each pixel to represent your binary payload. I doubt this would be noticeable, especially with a photograph.