I just finished William Gibson's Neuromancer and I'm still puzzled by the famous password that Lady 3Jane is the only one to know, the password needed to remove the restraining bolt on Wintermute.
It's not stated clearly :
and his voice the cry of a bird
3Jane answering in song, three
notes, high and pure.
A true name.
I thought about Wintermute or Neuromancer, but both have 4 syllables.