Method for protection of encipherment of digital document as well as client terminal equipment

Abstract

The invention discloses an encryption protection method of a digital document and a client device to solve the problem that the document cannot be protected when the client generating the document leaves the network or the document is in an editing state. In the present invention, the client system directly encrypts the document, and binds the encryption key with the hardware information or encrypts it with the public key of the server system, so that the document is protected; when the document is in the editing state, the local client device protection mode is adopted, The client machine realizes the protection of the document alone; when the document is in the network circulation state, the network server protection method is adopted, and the server system network authentication is used to realize the protection of the document, and when the document is authorized to be used by other clients, the protected document can be Re-passed from other client devices for recycling.

Description

technical field [0001] The invention relates to the technical field of digital copyright protection, in particular to an encryption protection method for digital documents and a client device. Background technique [0002] With the development of the Internet, more and more digital content such as e-books, music, movies, and pictures are disseminated online. Since digital content is easy to copy and modify, there are a lot of piracy and infringement problems in digital content disseminated on the Internet. Therefore, copyright protection for digital content is becoming more and more important. [0003] There are mainly two types of digital copyright protection methods, one is digital watermarking technology, and the other is DRM (Digital Rights Management, digital rights protection) technology with data encryption and copy protection as the core. Digital content protected by DRM technology includes eBooks (eBooks), videos, audios, pictures, and the like. [0004] The main ...

AI Technical Summary

Problems solved by technology

[0006] 1. The process of encrypting and protecting documents may require the participation of a digital copyright protection server system, which cannot be independently encrypted and protected by the client; or it can only be encrypted on the client, and cannot be circulated and disseminated

The former is found in systems where documents need to be circulated, and the latter is found in stand-alone encryption systems where documents cannot be circulated in an encrypted state. These two methods are independent of each other and cannot be used together

[0007] 2. The document being modified is not suitable for the mandatory requirement to be in a networked state, and may not be able to communicate with the server system, but the document needs to be circulated after it is written

[0008] 3. Written documents that have entered the circulation link cannot be used after leaving the network, and the written documents may also be revised

Images