Tell me you didn’t read the article without telling me you didn’t read the article.
The entire thing is explaining how they are upholding privacy to do this training.
- It’s opt-in only (if you don’t choose to share analytics, nothing is collected).
- They use differential privacy (adding noise so they get trends, not individual data).
- They developed a new method to train on text patterns without collecting actual messages or emails from devices. (link to research on arXiv)
Yeah, that’s on OP. The article is actually titled, “Understanding Aggregate Trends for Apple Intelligence Using Differential Privacy.”