System and method for encrypted multimedia information management

A system for encrypted multimedia information management for a second user to check a multimedia information of a first user, comprising:

• a sensing device having a wireless communication element storing an identification code;
• a first information device informationally connected with the sensing device and a server, and having a first communication unit for obtaining the identification code of the sensing device, the first information device further having a first processor for generating a public key by use of a first key generation function based on an identity feature of the second user, wherein the public key generated by use of the first key generation function is employed to encrypt the multimedia information for the first time, associate the multimedia information with the identification code, and to upload the multimedia information and a time condition to the server;
• and
• a second information device informationally connected with the sensing device and the server, and having a second communication unit for obtaining the identification code, the second information device further having a second processor for generating a private key corresponding to the public key by use of the first key generation function based on the identity feature, wherein the second information device is employed to transmit the identification code and the private key of the second information device to the server,
• wherein the server comprises a memory unit for storing the identification code, the time condition, and the multimedia information and further comprises a processing unit for generating a key based on a second key generation function by use of the identification code and the time condition, and wherein the key is employed to encrypt the first encrypted multimedia information for the second time, and wherein the processing unit is employed for filtering out the corresponding multimedia information by use of the identification code, and wherein the processing unit employs the key generated based on the second key generation function by use of a current time point and the identification code to decrypt the multimedia information for the first time, and wherein the processing unit conducts a second decryption with the private key, and wherein, after the decryption is completed, the multimedia information is sent to the second information device.