Apple Inc.’s Robby Walker, one of the iPhone maker’s most senior artificial intelligence executives, is leaving the company, according to people with knowledge of the matter.

One common criticism of passkeys is their inability to mitigate all security weaknesses. For example: Passkeys don’t protect ...

Perplexity is an AI-powered search tool that excels at delivering speedy and relevant answers in a conversational tone. But it’s now come up against two long-established giants of knowledge ...