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From the interview I linked, Apple Privacy head Erik Neuenschwander said, “The hash list is built into the operating system, we have one global operating system
by lawkwok 5y ago
From the interview I linked, Apple Privacy head Erik Neuenschwander said, “The hash list is built into the operating system, we have one global operating system and don’t have the ability to target updates to individual users and so hash lists will be shared by all users when the system is enabled.”
Where did you hear sharing hashes is illegal? How would anybody determine whether CASM at scale without those hashes?
Your hackerfactor source states, “In 2014 and 2015, NCMEC stated that they would give MD5 hashes of known CP to service providers for detecting known-bad files.”
- trynumber9 5y agoNCMEC will share MD5 but not the hashes used for perceptual matching.
- nabakin 5y agoThe important part about the hackerfactor link is that the author claims he was able to reverse PhotoDNA hashes into images. Of course Apple has their own, different perceptual hashing algorithm NeuralHash which they use, but if the hashes of a similar system can be reversed into images, maybe NeuralHash hashes can be reversed as well. Therein lies the problem. Edit: i.e. OP isn't talking about MD5 hashes