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Video file encryption method and device, and video file decryption method and device

A technology for video files and encryption methods, applied in the information field, can solve the problems of low decryption speed and decryption efficiency, and low security of encryption methods.

Active Publication Date: 2016-07-20
BEIJING QIHOO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when an encrypted video file needs to be played, it is usually necessary to decrypt the complete video file, resulting in low decryption speed and decryption efficiency of the existing video file; When encrypting, the beginning of the video file is usually encrypted, so that the player with the skip function can skip the encrypted part and then play the video file normally, resulting in low security of the existing encryption method

Method used

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  • Video file encryption method and device, and video file decryption method and device
  • Video file encryption method and device, and video file decryption method and device
  • Video file encryption method and device, and video file decryption method and device

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Embodiment Construction

[0033] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be more thoroughly understood, and will fully convey the scope of the present disclosure to those skilled in the art.

[0034] The embodiment of the present invention provides a video file encryption method, such as figure 1 As shown, the method includes:

[0035] 101. Acquire key frames in the video file.

[0036] The key frame may be a video frame corresponding to a character movement or an object movement or a key action in a state change in the video file. Specifically, the key frame may be pre-identified in the video file by a specific...

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Abstract

The invention discloses a video file encryption method and device, and a video file decryption method and device, and relates to the technical field of information. According to the methods and the devices, the decryption speed and decryption efficiency of a video file can be improved, and moreover, the encryption security of the video file can be improved. The method comprises following steps of obtaining key frames in the video file; carrying out preset logic operations to the data of preset bytes or fields in the key frames and the data of target bytes or fields in the key frames, thus obtaining an encryption secret key, wherein the target bytes or fields are different from the preset bytes or fields in the key frame bytes; and encrypting the data of the preset bytes or fields in the key frames through the encryption secret key. The methods and the devices are applicable for encrypting and decrypting the video file.

Description

technical field [0001] The present invention relates to the field of information technology, in particular to a video file encryption and decryption method and device. Background technique [0002] With the continuous development of network and information technology, intelligent terminals, such as mobile phones and personal computers, have gradually become indispensable daily necessities for people. These smart terminals all have video playback functions. For reasons such as user privacy and security, many video content needs to be encrypted. [0003] At present, the encryption of the video file by the smart terminal is usually to encrypt the complete video file or part of the video file. However, when the encrypted video file needs to be played, it is usually necessary to decrypt the entire video file, resulting in low decryption speed and decryption efficiency of the existing video file; When encrypting, the beginning part of the video file is usually encrypted, so tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/2347H04N21/4385
Inventor 张福生
Owner BEIJING QIHOO TECH CO LTD
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