---

excalidraw-plugin: parsed
tags: [excalidraw]

---
==⚠  Switch to EXCALIDRAW VIEW in the MORE OPTIONS menu of this document. ⚠==


# Text Elements
Mineral comes
out of the ground
 ^DG2MSniZ

Wholesaler ^XClsOfzM

Manufacturer ^pGNYVhjr

Manufacturer ^CRwxAbGF

Certificate ^k6eEBTji

Certificate ^KB3IjPdQ

Certificate ^HF7626x4

Certificate ^cLckZ9Jj

Certificate ^UqiUZ9y5

Certificate
(duplicate) ^cgaJCMyf

Certificate
(duplicate) ^cJhdlhw7

Double spend problem: The wholesaler could provide
the same certificate to different manufacturers.

How do we prevent double spend?

Audit of the wholesaler => show me what you bought and what you sold
Do they add up? (structure + tech solution)

Wholesaler are honest (ontological solution ...)

NB: you could also worry about generation of "fake" certificates
but this seems trivially solvable by having the issuing authority
digitally sign their certificates and publish their public key. ^H2TZXU2p

"Illegal" metals ^VCinCbQQ

NB: "authority" and trust for the initial
certificate issuance logically
HAS to be outside of blockchain.
Blockchain can NOT address "trust" here. ^mhWAXKZt

Phone ^SVgUyQzn

Phone ^2UMTpHri

Supply Chain Tracing ^1LU7A4M2

What's the problem?
I want to know what went into my phone and where it came from?
E.g. re there "conflict minerals" in there? How much co2 was involved ... ^wxcn01tW

Stage 1: Mining ^C618fKjp

Stage 2: Aggregation ^BSJxcM2U

Stage 3: Manufacturing ^oSh4ZZoK

Stage 4: Consumer ^YK0fin9l

Phone is planet friendly! ^G6GJGRw8

!! Phone seems planet friendly
but is NOT! ^jctG5kXf

How is Blockchain/DLT relevant? How is it better or worse
than other solutions (e.g. centralized DB or honest wholesalers) ^82yluRaQ

these are
"legitimate"
from place X ^36VXGWo8

%%
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