bitcrypt
BitCrypt is a free ultra-strong encryption that hides text in bitmaps.
...The program processes a user-supplied text encrypting it with the Rijndael cipher and storing it in a user-selected bitmap image. This later step is called steganography, which means "to hide invisibly".
If you intend to store sensitive information invisibly, you may encrypt it with BitCrypt and keep it in a picture image.
Alternatively, if you intend to pass information to another party, you may encrypt it using BitCrypt and publish it as a part of a website. In this manner, another party can access it without anyone realizing that information is transmitted.
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