  Consensus mechanism is the heart of any blockchain network. Many projects
have proposed alternative protocols to improve restricted scalability of Proof
of Work originated since Bitcoin. As an improvement of Delegated Proof of
Stake, in this paper, we introduce a novel consensus, namely, Delegated Proof
of Reputation, which is scalable, secure with an acceptable decentralization.
Our innovative idea is replacing pure coinstaking by a reputation ranking
system essentially based on ranking theories (PageRank, NCDawareRank and
HodgeRank).
