Spiro gave a thin, mirthless smile. ‘Oh, I’m sure they could figure it out. Even if it took a couple of years, it won’t matter to you. Not where you’re going.’
‘If I go anywhere, then the C Cube’s secrets go with me. Its every function is coded to my voice patterns. It’s quite a clever code.’
Butler bent his knees slightly, ready to spring.

The Eternity Code, Chapter 1