Multimedia file encryption and decryption method based on RSA
A multimedia file and encryption method technology, applied in the direction of instruments, electrical digital data processing, digital data protection, etc., can solve the problems of good encryption strength and weak real-time performance, and achieve the effect of enhancing encryption strength
Pending Publication Date: 2021-12-31
SHANDONG ARTAPLAY INTELLIGENT TECH CO LTD
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Problems solved by technology
The encryption technology for multimedia files (such as MP4 files) has overall encryption. This method has good encryption strength but weak real-time performance; selective encryption technology can improve encryption efficiency and enhance real-time performance, but how to find a balance between security and real-time performance become a new problem
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[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0024] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0025] figure 1 The flow chart of the file encryption method is shown, and the main flow is as follows:
[0026] 1) Generate the key pair used for encryption and decryption.
[0027] 2) Read the source file in chunks.
[0028] 3) Determine whether it is the first data block or a data block that is an inte...
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The invention provides a multimedia file encryption and decryption method based on RSA. According to the method, the header information and the data information of the multimedia file are partially encrypted according to the specific step length, and the encryption flag bit is added, so that the encryption process is realized. In the decryption process, the secret key needs to be decrypted firstly, and the encrypted part is decrypted according to the process opposite to the encryption process. According to the method, triple encryption of the multimedia file is realized through the step length, the encryption flag bit and partial encryption, and the reliability is ensured; and the partial encryption ensures the encryption speed. Moreover, the encryption and decryption mode does not affect the simultaneous playing and fast forward and fast backward functions of the multimedia file.
Description
technical field [0001] The invention relates to a multimedia file encryption and decryption method based on RSA, and belongs to the technical field of encryption and decryption. Background technique [0002] In the context of the widespread deployment of Internet video services and the sharp increase in online video resources, how to protect the legal copyright of video resources and suppress online video piracy has become more and more important. Effective content encryption technology is the key to copyright protection, ensuring the manageability and controllability of Internet video service operations. Encryption technology for multimedia files (such as MP4 files) has overall encryption. This method has good encryption strength but weak real-time performance; selective encryption technology can improve encryption efficiency and enhance real-time performance, but how to find a balance between security and real-time performance became a new problem. SUMMARY OF THE INVENT...
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IPC IPC(8): G06F21/60G06F21/62
CPCG06F21/602G06F21/6209G06F2221/2107
Inventor 刘旭张宇谢恩鹏刘永辉李帅
Owner SHANDONG ARTAPLAY INTELLIGENT TECH CO LTD