Reposting my comment: The iPhone has a secure enclave that does elliptic curve key generation and signing[0] (the key obviously cannot be exported). I'd be sur

Reposting my comment: The iPhone has a secure enclave that does elliptic curve key generation and signing[0] (the key obviously cannot be exported). I'd be surprised if they do not implement that soon; it's not terribly difficult[1]. [0] https://twitter.com/iangcarroll/status/830878517730623492 https://twitter.com/iangcarroll/status/830878517730623492 [1] https://developer.apple.com/documentation/security/1644033-seckeycopykeyexchangeresult?language=objc https://developer.apple.com/documentation/security/1644033-s...