The Quantum Thief (Jean le Flambeur, #1)

by Hannu Rajaniemi

I snap back to life like a rubber band, blinking. There is a discontinuity in my mind, a rough edge. The Archons change your neural makeup a little bit every time you come back. They claim that eventually Darwin’s whetstone will hone any prisoner into a rehabilitated cooperator.

I smile at her and wave. She ignores me. Apparently, the Prison thinks that counts as mutual cooperation: I feel my point score go up a little, warm like a shot of whisky. The glass wall is back between us. Well, that was easy. But still not enough against the warmind.

‘This is how it works. The exomemory stores data – all data – that the Oubliette gathers, the environment, senses, thoughts, everything. The gevulot keeps track of who can access what, in real time. It’s not just one public/private key pair, it’s a crazy nested hierarchy, a tree of nodes where each branch can only be unlocked by the root node. You meet someone and agree what you can share, what they can know about you, what you can remember afterwards.’

The way gevulot works is by generating a tree of public and private key pairs: a new pair is generated whenever the user has a new memory, domain or experience they want to specify gevulot rights for. They are also encrypted with the pair above them in the hierarchy. The point is that only the individual is supposed to have access to the root.