internet voice lock

     One of these days internet security may mean showing your thumbprint to your computer--or talking to it. Most people have probably been asked for a thumbprint at some time. Fewer have been asked to permit their voices to be recorded--to make what was once called a voice lock. My mom worked in a building that had these--years ago, in the 1970's. In theory the voice lock would open only to the sound of the same voice. It worked very well, to a point. the device really could tell one voice from another, and would not open except when it heard that voice. The problem was that a recording of the voice might work as well as a live person speaking.

Suggestion--perhaps a program sophisticated enough to tell a live voice from a  recording could be given a try