Héctor Naves Sordo in Physics, Sci-Fi | February 1, 2017 Spacetime was not just a computer, it was a trusted quantum computer Spacetime was not just a computer, it was a trusted quantum computer. To run anything on it, you needed a key, to open Planck-scale locks. The Causal Angel by Hannu Rajaniemi. Héctor Naves Sordo Published February 1, 2017