Method for encrypting and decrypting streaming document and device thereof

Abstract

The invention relates to the field of digital publishing, and discloses a method for encrypting and decrypting a streaming document and a device thereof. According to the method, each part of one streaming document is encrypted at different encrypting grades, general contents can be encrypted by adopting a low-security-level rapid encryption algorithm, and important contents are encrypted by adopting a high-security-level safety encryption algorithm, so that the overall encryption speed of the document is increased, the demand on computing resources in a computer system is lowered, and the security of the important contents is ensured. Each part of one streaming document is encrypted by adopting different encrypting grades, and the contents of a low encryption security level can be decrypted rapidly, so that the overall decryption speed of the document is increased. At a lowest encryption security level, encryption is not performed, so that computer resources needed by encryption can be further reduced; parts of contents of the streaming document do not need to be decrypted during use, so that the demand of terminal equipment on computing resources is lowered; the method and the device are particularly suitable for trial reading of parts of chapters.

Description

technical field [0001] The invention relates to the field of digital publishing, in particular to the encryption and decryption technology for streaming documents. Background technique [0002] Today, with the continuous development of digital technology and computer network technology, along with the widespread popularization and application of modern science and technology represented by information technology, the digital publishing industry has entered a stage of vigorous development. Digital publishing refers to a new publishing method that uses digital technology to edit and process content and disseminate digital content products through the network. Its main features are digital content production, digital management process, digital product form and networked communication channels. At present, digital publishing products mainly include e-books, digital newspapers, digital periodicals, online original literature, online educational publications, online maps, digital...

AI Technical Summary

Problems solved by technology

[0006] This encryption method often faces a dilemma. If the encryption level is defined too high, the server encryption cost (that is, the encryption time) will be too high. Especially for applications that require dynamic encryption, the customer will have to wait for a long time. The cost of the subordinate server will also be higher; and if the security level is defined too low, it is easy to be cracked and cannot meet the requirements of the publisher

[0007] Therefore, it is necessary not only to ensure the security of the content, but also to increase the overall encryption speed of the document and reduce the demand for computing resources in the computer system. This technical contradiction has not been resolved.

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