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.
Polymath simplifies the legal process of creating and selling security tokens. It makes a new token standard, the ST20, and enforces government compliance. Only a “list of authorized investors and their Ethereum wallet addresses” can hold ST20 tokens. Therefore, token issuers don’t need to worry about the legal implications of your security falling into the wrong hands. In order to launch a legally compliant token, the Polymath platform brings together issuers, legal delegates, smart contract developers, KYC verification, and a decentralized exchange. All transactions on the Polymath platform take place using the native POLY token. Polymath has programmable equity. Polymath enables companies to take control of their equity issuance through programmable code. It is raising in cryptocurrency opens up an entire wealth of new investors. Polymath eliminates the middleman and financial structures that hinder the deployment of equity. There is a trove of wealth that is untouched by Wall Street that can now be accessed through Polymath. In 2017, Polymath raised over $1.2 billion in funding by selling utility tokens and security tokens. Utility tokens, such as Waltonchain, give you access to a token’s network and are far more common than security tokens. Security tokens, however, provide equity or a claim to dividends from a company. As a result, security tokens, like any securities, are subject to government regulation. Polymath’s new standard for blockchain security tokens aims to embed the necessary regulatory requirements into smart contracts and comply entirely with government security regulations. A wide array of security tokens that will be listed on Polymath at some point will require investors to be accredited, or to be from specific countries.