Grin coin is a private & lightweight open source project based on the mimblewimble blockchain implementation. MimbleWimble is a lightweight blockchain protocol proposed by anonymous author that goes by the name Tom Elvis Jedusor (inspired by Harry Potter) in July 2016. Since then, the proposal has gained a huge following among Bitcoin and privacy advocates. Unlike bitcoin or ethereum, there are no addresses in Grin. In order to transact using Grin, both wallets must communicate with each other online with the results broadcasted to the network. Another key different is that transaction history (sender, receiver, amount) will not be recorded on the blockchain. Due to the removal of these information from the transaction, the data size remains small and that keeps the blockchain lightweight. New nodes can easily join the network without having to download a large blockchain. Grin coin was launched without an ICO, fundraising, or pre-mine. Developers around the world contribute openly with the goal to ensure the coin distribution remains as fair as possible. There are 2 popular wallets widely available to interact with the Grin network. Grin core wallet: https://www.coingecko.com/buzz/how-to-use-grin-wallet-to-send-receive-grin-coins Wallet713: https://www.coingecko.com/buzz/how-to-use-grin-wallet713-to-send-and-receive-grin-coin-step-by-step-guide The consensus algorithm used by Grin is the Cuckoo Cycle proof-of-work based. There are 2 hashing algorithms involved with Grin. Cuckoo-29 is meant for GPU mining while Cuckoo-31 is meant fo ASIC mining. This is a deliberate design to encourage miners to eventually move into ASIC mining for efficiency while keeping it fair at the beginning of the launch. Grin coin has launched its mainnet on 15th January 2019 and is now available for mining and trading.
Curecoin is a new SHA-256 based cryptocurrency with a big vision, that is - Curing Cancer, Alzheimer's, Huntington's, preventing viruses, and designing next-level of pharmaceuticals. Curecoin can be earned with both GPU and CPU. Folders use high-end GPUs and CPUs to fold proteins, earning a proportional amount of coins set-aside for their contributions. SHA-256 ASIC Miners could still get along by mining Curecoin as usual which will further secure the blockchain and the network. Whether you are heavily-invested in ASIC equipment or still have GPUs and CPUs, you can participate. Due to the nature of folding (diverse, constantly changing, not easily predictable), GPUs and CPUs will both always be relevant, so an investment in consumer hardware isn't wasted. Curecoins go to three main areas: Folders, Miners, and Developers. The folders get 76% of the total coins (80% of the coins distributed per day). SHA256 miners get 19% of the total coins (20% of the coins distributed per day). 2% of the total funds are distributed to people who donated to project development. The other 3% is dedicated to Curecoin developers, and will be used for paying for development costs (such as hiring professional programmers, paying for infrastructure, etc.), and for giving back to the community (folding hardware giveaways, faucets, covering 0% mining pools, etc.).