Photo by Etienne Girardet on Unsplash

Rebuilding A Flawed Data World with Zero-Knowledge

Prof Bill Buchanan OBE FRSE
The Startup
Published in
9 min readJan 19, 2020

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We live in an almost untrusted data world!

We live in a flawed and untrusted financial world!

So, let me pose a difficult question first, and I’ll answer it at the end:

“Prove to me that the [UK] currently — at this point in time — has economic stability in its financial infrastructure!”

You can insert your own country within the brackets, or any organisation or ranges of organisations that you want. Before you call up your auditors and get your accountants primed, let’s meet Angry Bob and Angry Alice …

Meet Angry Bob and Angry Alice

Bob applies for a loan from Alice The Lender, and she asks him for his salary. Bob says, “I don’t want to tell you that!”, and she says, “Well, you’re not getting a loan!”, and so Bob says that his salary is “One trillion dollars per year”, and Alice hangs up the phone. He calls her up again, and says sorry, and then says that his salary is “… somewhere between $60,000 and $100,000. Is that okay?”. Alice replies that this is fine and that his loan has been approved. “Can you now tell me your password?”, she says. Bob now hangs up the phone and goes to lie down in a dark room.

In this new information world, why do we have to continually prove the same things…

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Prof Bill Buchanan OBE FRSE
The Startup

Professor of Cryptography. Serial innovator. Believer in fairness, justice & freedom. Based in Edinburgh. Old World Breaker. New World Creator. Building trust.