Many people think that watermarks ruin images, so we wanted to create a way to tag an image with a signature of its creator/distributor without spoiling the visual appearance.
What it does
First our application takes a png/jpg file and encrypts a string (artist signature) within the file by uniquely altering each pixel value by a very small amount. This encrypted image will be the presented artwork (on sights such as devianart.com). Each image will have an associated alphanumeric value that is the hash of its original file. Therefore, only the original creator and/or distributor is the only person that can provide the correct key and see the correct signature (their own). Potential attackers would be unable to guess the correct hash to falsely verify their ownership of the artwork and even if they were able to that hash would show the signature of the true owner anyway.
How we built it
Challenges we ran into
Accomplishments that we're proud of
Successfully encrypting and decrypting PNG/JPG files. coupling Chrome extension interface with decryption algorithm.
What we learned
Many social media sights compress images posted. Compression is lossless if the image is a png, but lossy if it is a jpg.
What's next for Anonymark
There is a market for this type of product on sights such as devian art. As more and more art is shared online it is crucial to prevent plagiarism.