According to John Gruber this does work on SMS, but is a feature of the app, not the service: > It’s also worth pointing out that it’s a feature of the Message

According to John Gruber this does work on SMS, but is a feature of the app, not the service: > It’s also worth pointing out that it’s a feature of the Messages app, not the iMessage service. For one thing, this means it applies to images sent or received via SMS, not just iMessage. But more importantly, it changes nothing about the end-to-end encryption inherent to the iMessage protocol. The image processing to detect sexually explicit images happens before (for sending) or after (for receiving) the endpoints. It seems like a good feature with few downsides. (The EFF disagrees.) https://daringfireball.net/2021/08/apple_child_safety_initiatives_slippery_slope https://daringfireball.net/2021/08/apple_child_safety_initia...