  PAI Coin's Proof-of-Work (PoW) consensus mechanism utilizes the double
SHA-256 hashing protocol-- the same mechanism used by Bitcoin Core. This
compatibility with classic Bitcoin-style mining provides low barrier to entry
for PAI Coin mining, consequently rendering the PAI Coin network vulnerable to
so-called 51% attacks, among others. To mitigate such risks, this paper
proposes a hybrid Proof-of-Work, Proof-of-Stake (PoS) consensus mechanism and
provides a detailed technical analysis of how such a mechanism would counter
some of the PAI Coin network's inherent vulnerabilities, if successfully
implemented. A detailed technical outline of blockchain-based PoW & PoS
consensus, including their advantages and disadvantages, when used both
independently and in the context of the hybrid model, is provided. An economic
analysis of attacking a hybrid-powered PAI Coin network is presented, and a
final recommendation for future development of PAI Coin consensus is made.
