The control of the ship depended on an audio-visual identity link; Kraiklyn’s face was recognized by the craft’s computer, as was his voice when he said, “This is Kraiklyn.” It was that simple. The ship had once had a retina recognition lock as well, but it had malfunctioned long before and been removed. Horza was pleased; copying somebody’s retina pattern was a delicate and tricky operation, requiring, among a lot of other things, the careful growth of lasing cells around the iris. It almost made more sense to go for a total genetic transcription, where the subject’s own DNA became the model
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