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> Digital signing of data

When you get to the heart of things, that's all blockchain is anyway. The "blockchain" part really just describes how it's organized - in a signed chain

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It occurred to me also that you’d have to include trust, a la digital signatures as part of the solution also or the whole discussion wouldn’t make sense. If the block chain network actors aren’t trusted it leaves too much room for malicious behavior on the block chain itself.

I also wonder how efficient it is to “query the block chain”?

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