WeChat, the popular Chinese messaging app, already uses content matching to identify dissident material. India enacted rules this year that could require pre-screening content critical of government policy. Russia recently fined Google, Facebook and Twitter for not removing pro-democracy protest materials.
We spotted other shortcomings. The content-matching process could have false positives, and malicious users could game the system to subject innocent users to scrutiny.
We were so disturbed that we took a step we hadn’t seen before in computer science literature: We warned against our own system design, urging further research on how to mitigate the serious downsides. We’d planned to discuss paths forward at an academic conference this month.
That dialogue never happened. The week before our presentation, Apple announced it would deploy its nearly identical system on iCloud Photos, which exists on more than 1.5 billion devices. Apple’s motivation, like ours, was to protect children. And its system was technically more efficient and capable than ours. But we were baffled to see that Apple had few answers for the hard questions we’d surfaced.
China is Apple’s second-largest market, with probably hundreds of millions of devices. What stops the Chinese government from demanding Apple scan those devices for pro-democracy materials? Absolutely nothing, except Apple’s solemn promise. This is the same Apple that blocked Chinese citizens from apps that allow access to censored material, that acceded to China’s demand to store user data in state-owned data centers and whose chief executive infamously declared, “We follow the law wherever we do business.”
https://www.washingtonpost.com/opinions/2021/08/19/apple-csam-abuse-encryption-security-privacy-dangerous/?fbclid=IwAR325SFSTo3uilTF5xZaKWbtUUoTnzyC3rA1vsW0_gTcywReDn42keqh86I
