Exploiting and Defending Against the Approximate Linearity of Apple's NeuralHash

  title={Exploiting and Defending Against the Approximate Linearity of Apple's NeuralHash},
  author={Jagdeep Bhatia and Kevin Meng},
Perceptual hashes map images with identical semantic content to the same n -bit hash value, while mapping semantically-different images to different hashes. These algorithms carry important ap-plications in cybersecurity such as copyright in-fringement detection, content fingerprinting, and surveillance. Apple’s N EURAL H ASH is one such system that aims to detect the presence of illegal content on users’ devices without compromising consumer privacy. We make the surprising discovery that N… 



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