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There could be used a "Proof of Authorization" model. For example when 2 of 3 nodes or even 3 of 4 nodes agree on "ServerA belongs to public key A" the entry is written to the block chain.
Should we use an public or
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private ledger?
Let's start with a private ledger.
Open issues / quedtionsquestions
Why not using x.509 certifictescertificates?