Real World article
(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 featured the voices of Avery Brooks, Armin Shimerman, and Majel Barrett. The program locked and protected 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.