I was under the impression that the oracle voting built into the wallet was a consensus protocol. What would you consider it then? Maybe you have not used recent versions? The proof of person to verify is something completely different...
Consensus Algorithms in Blockchain A consensus algorithm is a procedure through which all the peers of the Blockchain network reach a common agreement about the present state of the distributed ledger.
source:
https://www.geeksforgeeks.org/consensus-algorithms-in-blockchain/As far as I know Idena uses BFT (Byzantine Fault Tolerance) consensus.