Paranoia allows a user to securely transfer a text message by hiding it in a digital image file. 128 bit AES encryption is used to protect the content of the text message even if its presence were to be detected. Currently, no methods are known for breaking this kind of encryption within a reasonable period of time (i.e., a couple of years). Additionally, compression is used to maximize the space available in an image.
To send a message, a source text, an image in which the text should be embedded, and a key are needed. The key is used to aid in encryption and to decide where the information should be hidden in the image. Either another image or a short text can be used as a key. To receive a message, a source image containing the information and the corresponding key are both required. The result will appear in the text tab after decoding.
Information Source: https://ccrma.stanford.edu/~eberdahl/Projects/Paranoia/index.html
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