Do we know that they are using perceptual hashing? I am curious about the details of the hash database they are comparing against, but I assumed perceptual hash

Do we know that they are using perceptual hashing? I am curious about the details of the hash database they are comparing against, but I assumed perceptual hashing would be pretty fraught with edge cases and false positives. e: It is definitely not a strict/cryptographic hash algorithm: "Apple says NeuralHash tries to ensure that identical and visually similar images — such as cropped or edited images — result in the same hash." They are calling it "NeuralHash" -- https://techcrunch.com/2021/08/05/apple-icloud-photos-scanning/ https://techcrunch.com/2021/08/05/apple-icloud-photos-scanni...