Send message between two blockchain nodes

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How can I send messages from user A to user B on the blockchain network? A diagram has been mentioned below:

enter image description here

If I have a blockchain network with 5 nodes. Each node represents one "Organisation". How can User A in Organisation 1 send a message to exact User B in organisation B? Can send messages between two blockchain nodes, for example node 1 and node 3 or other node in the blockchain network. But, at User A, how can he determine "where is User B" ? 

Mar 16 in Blockchain by Soham
• 8,730 points
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1 answer to this question.

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The answer is Blockchain as at the end, a Blockchain network provides you the validated and verified information that is registered in the network and is sent to all the participants of the network. In the case of Hyperledger-Fabric, you would have to generate a channel for organisations 1 and 3 of your illustration. In this way, only those two organisations will see the data registered by User A.

answered Mar 24 by Rahul
• 8,980 points

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