At Apple's Worldwide Developers Conference on Monday, the company debuted a slew of products and services, including a new Mac Pro that's part raw computing power, part cheese grater. But one new feature, mentioned in passing, could have an outsized impact on user security and privacy for years to come. Apple now has its own single-sign-on scheme—and it's a major reimagining of how such a mechanism can work. You've seen single-sign-on before, even if you don't use it.
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