APPARATUSES AND SYSTEM FOR THE PRIVACY AND SECURITY OF USER FILES STORED AT A CLOUD SERVER

• Main Authors: HUANG, Jiejing, WANG, Chan, WU, Huangwei
• Format: Patent
• Language: English; French; German
• Published: 12.09.2018
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; PHYSICS; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The present invention discloses an information processing method and apparatus, an information retrieval method and apparatus, a user terminal, and a server. The retrieval method includes: receiving, by a first user terminal, information, sent by a second user terminal, about an address used to save an encrypted file of the second user terminal; acquiring, from a cloud server and a trusted server, privacy information, non-privacy information, and a shared key that correspond to the address information; obtaining address information of a to-be-accessed file by searching the privacy information and the non-privacy information; acquiring, from the cloud server, a first encrypted file corresponding to the address information of the to-be-accessed file; and decrypting the first encrypted file by using the shared key, to obtain the to-be-accessed file. In the present invention, because a trusted server is introduced in an information retrieval process, an encrypted file that is uploaded to a cloud server by a user terminal can be searched by a trusted third-party user terminal, thereby making full use of performance of the cloud server while ensuring security of a user file.