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Grin Coin is a privacy-focused, secure (PoW) and scalable cryptocurrency that supports electronic transactions without censorship and restrictions. Grin is a cryptocurrency that aims to solve the privacy and scalability issues that are currently lacking in big brother, Bitcoin. The project is based on the Mimblewimble protocol, based on an updated whitepaper published by Andrew Spoelstra on the 6th of October 2016. It proposes a new approach to the blockchain-based ledger, making transactions more private and scalable.