SDChain, or SixDomainChain is the world's first decentralized public blockchain ecosystem that integrates international standards of IoT Six-Domain Model and reference architecture standards for distributed blockchain. Fully considering the technical characteristics of IoT and the development needs of business ecosystem, SDChain is optimized based on existing blockchain technology with digital asset issuance, user credit and identity management, P2P communication, encryption algorithm, consensus algorithm, smart contract, cross-chain contract mode, market consensus-based incentives, decentralized DApp and rapid access to business. Such features ensure beneficial, rapid and sustainable development of SDChain business ecosystem to achieve mutual benefits among digital assets, blockchain and industrial IoT through efficient circulation and value transformation of digital asset credits, within a global framework of ISO/IEC standards.

IOTA was specifically designed to manage transactions for the rapidly growing network of devices that are connected to the internet. Instead of focusing on peer-to-peer transaction, IOTA aims to create the underlying infrastructure that will allow self-regulating transactions to occur between machines (watches, refrigerators, TVs, cars, etc.) on the Internet of Things.
Although IOTA cannot be strictly defined as a blockchain protocol, it uses a distributed ledger protocol called a Tangle, that has many of the same trustless features, but is fundamentally different because it has a different data structure that does not depend on blocks. The IOTA Tangle is a decentralized architecture with no transaction fees and no limitations on the amount of transactions that can be confirmed.
IOTA has several innovative features that are aimed at solving the scalability problems of blockchains. The Tangle drastically improves transaction times and reduces the storage requirements that are typical of other decentralized transaction protocols. This is achieved by removing the necessity of miners to confirm transactions, and making validation an intrinsic aspect of using the platform.