They have been. Through years of use, independent auditing, industry and government certification processes, and their Apple Security Research program.
replyThey've published several whitepapers and technical documentation on how the secure enclave works and it's been poked at by security researchers for years.
replyIf it's not open source (with open hardware), you cannot trust it. Whitepapers are great, but who knows what's actually implemented.
replyApple can’t prove a negative. You have to prove they’re lying.
replyYou can. They do all the time in math and programming.
replyYou don't have to prove anything. You need to asses your risk profile and decide if you want to expose yourself to Apple or not.
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