(written from a Production point of view)
Star Trek: Deep Space Nine - Voice Print was a computer program developed by QVoice and released in 1995. It features the voices of Avery Brooks, Armin Shimerman, and Majel Barrett. The program would lock and protect programs on a PC and would only unlock them when the correct voice was spoken. The program also allowed a person to record and play back a message.
A 1998 updated edition added facial recognition capabilities to the software.