Third-Party Ciphertext Retrieval Method Based on File Name

Abstract

The invention discloses a third-party ciphertext retrieval method based on a file name. The third-party ciphertext retrieval method based on the file name mainly solves the problems that for an existing ciphertext retrieval scheme, the security is low, the algorithm complexity is high, and the existing ciphertext retrieval scheme cannot adapt to frequent changes of a file. The method comprises the steps that 1, four different secret keys are randomly generated by a user; 2, a file owner conducts encryption on file content through a symmetric encryption algorithm and uploads the file to a third-party server; 3, segmentation is conducted on file name cleartext, filling is conducted, then encryption is conducted, the file name cleartext is submitted to the third-party server, and hash operation and coding are conducted; 4, symmetric decryption is conducted on file content ciphertext and file name ciphertext which are obtained by downloading, and file content cleartext and file name cleartext are obtained; 5, when a file needs to be retrieved, the user conducts encryption on retrieval keywords and submits the encrypted retrieval keywords to the third-party to conduct retrieval to search out the target file. According to the third-party ciphertext retrieval method based on the file name, due to the fact that encryption protection is conducted on the file name and the retrieval keywords, the security is high, the operation is simple, the efficiency is high, and the third-party ciphertext retrieval method based on the file name can be used for cloud storage.

Description

technical field [0001] The invention belongs to the technical field of digital information processing, in particular to a file name cipher text retrieval method, which can be used for storage management of an information processing system and file retrieval. Background technique [0002] With the development of cloud computing, cloud storage has also developed. Cloud storage is actually storing data in a third party. However, the third party's data security control is insufficient, which may easily cause loss and leakage of user data. In order to protect the security of the data, the data is usually encrypted before being stored in a third party, so that all users except the user and the third party cannot know the user's plaintext data information, but this brings great harm to the data retrieval. difficult. [0003] Unlike plaintext retrieval, searches stored in third-party files are retrieved based on ciphertext. For the ciphertext files in the third party, if all the ...

AI Technical Summary

Problems solved by technology

However, the retrieval of the file content involves the extraction of keywords and the establishment of the index table. The process is complicated and the efficiency is low; secondly, because the file name is not encrypted, it is easy to leak the privacy of the user and affect the security of the data; The addition and deletion operations of the file need to change the index table, which is difficult to adapt to the application scenario with frequent file changes

Images