[evandale]

> No, because the point is that you get to know who sold them the RAM chips that went into the device, because the RAM chip vendor digitally signed the sale of those chips to them, and their repair job "consumes" that item in their own digital inventory to convert one manifest (representing all the parts in a phone with bad RAM) into another manifest (representing all the parts in a phone with good RAM.) The provenance of the replaced RAM chips "travels within" the provenance of the repaired phone. It's a tree of component sourcing, not just a log of repairs.

Thank you and apologies for all the questions! I'm very fascinated by this but not sure where to start. Is this part of the chain-of-provenance you spoke about?

Also wondering if you have anything helpful to share to learn more. I'm really curious about how the "consume" part works in practice. I was trying to get at a situation where someone fixes the RAM but doesn't update the inventory? Or if you lost your phone, do you have to report it lost to invalidate the manifest? I'm also struggling to imagine what happens when the RAM goes bad? Does that phone with bad RAM get a new signature? How does the phone turn from a phone that works into a phone with bad RAM digitally?