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|_ _|_ __ ___ __ _| \/ |___ __ _
| || '_ ` _ \ / _` | |\/| / __|/ _` |
| || | | | | | (_| | | | \__ \ (_| |
|___|_| |_| |_|\__, |_| |_|___/\__, |
|___/ |___/ v1.2
Live demo at
Install dev-dependencies
npm install
Building for production
npm run build
Debugging
npm run start
About
Encode long messages as small color fluctuations, indistinguishable from white noise.
The message is first compressed using Pieroxy's lz-string, then encrypted using industry standard AES-256 encryption with the 256th SHA256 hash derivative of the salted password, then protected against errors using G24 extended Golay code, and, finally, scattered bit-by-bit on the chosen target image into random places with a PRNG using a derivative of the hash of the password, so that each password scatters the encoded message into a different random set of bits of sub-pixels in the image.
By utilizing the random bit-level scattering the encoded message appears to be random noise, or a loss in the image's color quality.
Note that for the message to be decodable, the image must be saved using a lossless compression. PNG images are ok but JPEGs are not!
Multiple messages can be encoded into the same image with different passwords. The number of messages is proportional to their length. Long messages of more than 4KB can rarely coexist with others. If the messages are, however, short (less than 128 characters) it may be possible to hide over 20 messages in the same image.
This very image contains several other hidden messages encoded with different passwords.
This is an entirely static single-page application. Absolutely no data is sent to the server after the page has loaded.
All image processing is done entirely inside the browser.