Ontology is a new high-performance public blockchain project & a distributed trust collaboration platform.It provides new high-performance public blockchains that include a series of complete distributed ledgers and smart contract systems. Ontology is a blockchain framework supports public blockchain systems and is able to customize different public blockchains for different applications. It also supports collaboration amongst chain networks with its various protocol groups.They will constantly provide common modules on the underlying infrastructure for different kinds of distributed scenarios, such as those for the distributed digital identity framework, distributed data exchange protocol, and so on. Ontology was created in 2017 by a Chinese company called OnChain, which is led by founders Erik Zhang and Da HongFei. OnChain has had huge success in the cryptocurrency industry, as they were also the founders behind the NEO blockchain, which is now a multi-billion dollar project. Essentially, Ontology was created as a way for businesses of all sizes to install blockchain technology within their company, without having to completely change all of their current systems. The purpose of the Ontology framework is that it is not intended to operate as a single blockchain. Instead, the technology will allow businesses to make full use of both a private and public blockchain. Each and every data transaction is confirmed in a decentralized environment, meaning that no single person or authority can take control of the network.
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.