Apple considers teaching Siri to recognize your voice & only your voice
Allowing Siri access from the lock screen is a potential security threat that has, in the past, allowed someone to access personal data like photos. Additionally, Siri will respond to any command given by anyone when your device is unlocked.
Apple thinks it has a solution, using a combination of special phrase to ensure that Siri responds to you and only to you …
Filed under: Apple