On the below link, there is a paragraph that says:
http://www.coindesk.com/stellar-ripple-hyperledger-rivals-bitcoin-proof-work/
“Each node publishes a public key. Any message coming through the node is signed by the node to verify its format. Once enough responses that are identical are reached, then you can agree that is a valid transaction.”
My Understanding:
Once a transaction
Hyperledger is an umbralla project aims at creating a modulus approach for assembling the blockchain solutions. It has a layered architecture including a separate consensus layer. The goal is you should be able to switch in-and-out the consensus policy of your business need
This table from Hyperledger Architecture, Volume 1 gives you examples of its consensus approaches in various child projects.