From "Millennium: The Beginning and the End (#2.1)"
This is how it works. When a file is designated compartmentalized, double-click this icon, speak clearly into the microphone and say, "Soylent Green is people."
Couldn't he just say his name?
He could. But I was under the impression that security was the priority. "Soylent Green is people" is not only an obscure reference to the last great American film, and therefore unlikely to be cracked by a hacker attempting random code phrases, but the six syllable pattern encompasses each frequency and vocal intonation unique to Mr. Black, therefore rendering replication nearly impossible and thus security foolproof.