N*N Plus Network ("NNP" for short) is a block system built on a P2P network. Similar to the current popular P2P digital currency system, it maintains transparent ledgers in a decentralized manner and realizes independent and safe management of users' digital assets and efficient flow. The NNP system is designed for IOT (Internet Of Things, Internet of Things) data business requirements, and uses block technology to provide a decentralized security management platform for IOT data services to achieve high concurrency and low latency performance requirements required by the IOT system.