A (late) Layman’s Overview of the Technology Behind Apple’s CSAM Detection
More specifically known as the ftPSI-AD ( fuzzy threshold Private Set Intersection with Associated Data ) protocol. EDIT 2021/09/04: Apparently as I was procrastinating writing this article Apple has agreed to postpone the roll out of the system. EDIT 2023/09/20: I procrastinated long enough to for the whole thing to have been scrapped. https://appleinsider.com/articles/23/08/31/apple-provides-detailed-reasoning-behind-abandoning-iphone-csam-detection Disclaimer: … Read more