> Apple is using a similarity based hash, so if the NCMEC database contains a picture that's similar to one that you have, it could produce a match even if it's not the same
It's actually worse than this, if the hashes are similar then they'll get sent for review. Your picture could be a picture of an abstract painting[0] which has no visual similarity to anything in the db, but through the magic of crypto is similar and it too will be flagged.
[0] The reason I use this example is because someone posted a bunch of abstract art that was flagged by the algo.
It's actually worse than this, if the hashes are similar then they'll get sent for review. Your picture could be a picture of an abstract painting[0] which has no visual similarity to anything in the db, but through the magic of crypto is similar and it too will be flagged.
[0] The reason I use this example is because someone posted a bunch of abstract art that was flagged by the algo.