2.2.2. Security

Security is the key for guarantee the data smoothly running in the network, and the distributed storage system based on blockchain enables the AIM network to have a high degree of security. The AIM network conducts safety protection for the data uploaded by users through homomorphic encryption and differential privacy (DP), and stores data by a discrete storage manner. The nodes with maintenance functions in the whole system can be used to build consensus and make joint protection for the medical health data on the chain, and the data cannot be tampered with.

The AIM network binds the medical data with the blockchain protocol to conduct trust authentication as well as safety and management, so that each person can manage their own health information and the right of controlling the data can be returned to users themselves. It can be economically beneficial for the data contributors. And users and institutions can share data, storage, computing power and other resources on the premise of safety, equality and trust. Thus, an open, transparent platform can be built.

The data on the chain can only be accessed by the owner or the authorized individual, and the access authorization is determined by the intelligent contract set by the user. For example, the user can authorize his or her own data access rights to 3A hospitals, and when the user needs it, the doctors can request the data for diagnosis directly from the user without going through a third part. By that way, the data can only be accessed by the owners, authorized group.