File encryption and deletion method and system capable of being remotely controlled

By encrypting files using collaborative public and private keys generated by the collaborative user client and managing the keys by the collaborating end, the problem of deleting files in an environment with incomplete trust is solved, enabling trusted deletion and secure control of files and enhancing the security of file storage.

CN122451931APending Publication Date: 2026-07-24UNIV OF CHINESE ACAD OF SCI
0 Cites 0 Cited by

Patent Information

Application Number
CN202610505577.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-16
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing encryption mechanisms make it difficult to achieve unified and controllable file deletion operations in remote storage environments that are not entirely trustworthy, posing a risk of data leakage, especially in collaborative use scenarios.

Method used

The collaborative user terminal generates a collaborative public key and a private key, and uses the encryption key and the collaborative public key to encrypt the file. After storage, the collaborative terminal manages the key. When the file is deleted, the collaborative terminal revokes or destroys the second private key to ensure that the file cannot be decrypted.

Benefits of technology

It enables trusted file deletion and security control, enhances file storage security, protects sensitive information, and provides the ability to remotely delete files.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention belongs to the field of remote data access control and passwords, and relates to a file encryption and deletion method and system capable of being remotely controlled. The method comprises the following steps: a first user side generates a first private key and a first public key, a cooperation side generates a second private key and a second public key, and the second public key is sent to the first user side; the first user side calculates a collaborative public key according to the first private key and the second public key; the first user side encrypts a to-be-encrypted file by using the encryption key and the collaborative public key to obtain an encrypted file, and sends the encrypted file to the storage side for storage; when the file is modified and checked, the second user side interacts with the cooperation side, and the encrypted file is decrypted by using the second private key to obtain a data plaintext; and when the file is deleted, the third user side initiates a deletion request to the cooperation side, and the cooperation side deletes the second private key of the encrypted file. According to the invention, the security of file storage can be enhanced, and the capability of remotely deleting the file can be provided for a file manager.
Need to check novelty before this filing date? Find Prior Art