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A blockchain is a decentralized ledger where all transactions are recorded.For having a reliable blockchain and double-spending prevention, we need adecentralized consensus and agreement on a blockchain. Bitcoin usesproof-of-work (PoW). It is a cryptographic puzzle that is difficult to solvebut easy to verify. However, because of significant latency of proof-of-workfor transactions confirmation, this consensus mechanism is vulnerable againstdouble-spending. On the other hand, PoW consumes a significant amount of energythat by growing the network, it becomes a major problematic of this consensusmechanism. In this paper, we introduce an alternative to PoW, because of allits major problems and security issues that may lead to collapsingdecentralization of the blockchain, while a full decentralized system is themain purpose of using blockchain technology. The approach we introduce is basedon a distributed voting process and called "RDV: Register, Deposit, Vote".Since in RDV algorithm, there is no mining process, so it is appropriate forlow-level energy devices and Internet of Things (IoT).

RDV: An Alternative To Proof-of-Work And A Real Decentralized Consensus For Blockchain