Object sharing system and object sharing method

An object sharing method, adapted to an object sharing system comprising a plurality of shared objects and a plurality of data servers respectively provided by a plurality of object suppliers,

• wherein each of the data servers is connected to each other to form a distributed data redundancy network, and the method comprises:
• storing a plurality of sub-secret data separated from shared secret information in a decentralized way by the data servers;
• receiving, by one of the shared objects, an access request sent by a user device;
• collecting a required quantity of the sub-secret data for reconstructing the shared secret information via the distributed data redundancy network by the data server connected to the shared object;
• and
• reconstructing the shared secret information using the collected sub-secret data for verifying an access right to the shared object for the user device by the shared object or the data server connected to the shared object,
• wherein the step of storing the sub-secret data separated from the shared secret information in the decentralized way by the data servers comprises:
• generating at least one first conference secret key of the shared secret information by using a first public and private key pair of the user device and a second public and private key pair of the object supplier;
• randomly generating pseudo secret information corresponding to the shared secret information agreed and shared by a plurality of participants participating in a sharing of the shared object;
• encrypting the pseudo secret information by using the first conference secret key and pairing encryption results with parameter values being randomly selected to construct a message hiding the shared secret information;
• and
• separating the pseudo secret information and the message into the sub-secret data and storing the sub-secret data to the data servers in the decentralized way.