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.
Litecoin Cash is an open source, peer-to-peer digital currency based on SHA-256 proof-of-work hashes. It’s also the world’s first blockchain to utilize HiveMine, the latest cutting-edge technology that helps to provide the ultimate protection from 51% attacks and double spending, and ensures the sustainable and long-term security of its public distributed ledger. The Litecoin Cash blockchain also has practical uses such as in the medical sector as it stores and manages electronic medical records in a secure way, as well as protecting sensitive data from hackers and giving patients more control over their information that complies with privacy regulations. LCC's target block time of 2.5 minutes gives 4 times the transaction bandwidth of Bitcoin, while transactions are 90% cheaper than Litecoin. HD wallets and native SegWit with bech32 addresses are fully supported Litecoin Cash was forked from Litecoin on 18 Feb 2018 at block 1371111, with a 10:1 Claim Ratio. For every 1 LTC held at the fork block, LTC holders could claim 10 LCC. If you held LTC at block 1371111 but haven't claimed yet, your LCC are still waiting for you! After many months of testing on tetnet The Hive became active on mainnet on Wednesday 6 Feb. 2019 The Hive is our brand new democratised mining concept, which feautures negligible energy cost and will help to. protect the coin against 51% attacks. Users create bees, agent-based mining workers which earn rewards for their owners.