5.1. Blockchain
Blockchain is the new application of computer science such as distributed data storage, peer-to-peer transmission, consensus mechanism and encryption algorithm. The consensus mechanism can be realized by the mathematical algorithm of establishing trust and obtaining benefits between different nodes in the blockchain system. Precisely speaking, the blockchain is a kind of chain data structure which is composed of data chunks sequentially connected in a chronological order, and it is the distributed ledger cryptographically being secured to ensure that it will not be tampered with or forged. Broadly speaking, the blockchain technology is a new type of distributed infrastructure and computing paradigm which verify and store data by using chain data structure, generate and update data by using the distributed node consensus algorithm, ensure the security of data transmission and access by right owner, and program and operate data by intelligent contracts consisting of automated script code. As shown in the figure:

With all the advantages of the blockchain, the AIM network can be divided into the token chain, data storage chain and AI model chain. According to the functions, we independently developed a cross-chain protocol, which can maintain the instant communication between chains, improve the concurrency capability of the whole system, and reduce service response time.
5.1.1 Token Chain
The token chain is the carrier of digital tokens which features decentralization and is based on the blockchain as the payment technology. The encrypted digital AIM token system realizes the point- to-point direct transaction, thereby avoiding the problems in traditional centralized payments, such as high service fees and complicated processes. All transactions must be authenticated by the network node and permanently recorded in the public distributed ledger of the token chain based on blockchain technology. AIM token is the most important tool to realize the value delivery of AI MEDICAL.
5.1.2 Data Storage Chain
Users' personal data are securely encrypted through differential privacy technology to integrate IPFS (interplanetary file storage) system, and we redevelop IPFS to create the engine that is suitable for medical and health data storage, and construct the personal NFT through the data storage chain.
5.1.3. AI Model Chain
The AI model chain will also use IPFS for model storage, and the AI model is the core of the company. On the chain, we will solve the security problem of the AI model storage and operation so that the AI model cannot be stolen by other competitors.
At the same time, different research institutes can set up different AI models through the data on the AIM network, and other medical institutions and users can choose different AI models to assist their medical treatment and achieve the purpose of continuously iterating AI model evolution with blockchain value consensus.
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