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Video frame data dual-authentication and hierarchical encryption method based on blockchain

A technology of video frame data and encryption method, applied in the field of video authentication, can solve the problems of invisibility and robustness, and achieve the effect of facilitating classification management, guaranteeing integrity, and simplifying the audit process

Active Publication Date: 2020-11-10
NANKAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its advantages are simple and direct, easy to implement, and its disadvantages are invisibility and poor robustness [16]

Method used

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  • Video frame data dual-authentication and hierarchical encryption method based on blockchain
  • Video frame data dual-authentication and hierarchical encryption method based on blockchain
  • Video frame data dual-authentication and hierarchical encryption method based on blockchain

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Embodiment Construction

[0123] The specific implementation manners of the present invention will be described below in conjunction with the accompanying drawings.

[0124] figure 1 The overall processing flow chart of the H.264 video in the present invention is given.

[0125] Such as figure 1 As shown, method M100 starts from step S110, step S120 reads the video file to be processed, step S130 decodes the H.264 encoded video file in this embodiment, and obtains 470 frames of frame data with a resolution of 960*540; select All 31 key frames (I frames) data frame 1 , frame 2 ,...,frame 31 . Step S140 performs a hierarchical encryption operation on the video frame data. Step S150, Step S160, Step S170, and Step S180 respectively perform the signature generation, saving to the blockchain, signature embedding, and signature verification operations mentioned later on the video to achieve the purpose of online and offline dual authentication of video integrity and authenticity . The method M100 end...

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PUM

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Abstract

The invention discloses a video frame data dual-authentication and hierarchical encryption method based on a blockchain. The method comprises the steps of generating a digital signature of the video frame data through a public key and a hash algorithm (such as SM2 and SM3); embedding a digital signature in a frequency domain based on a code of a relative size, so that offline verification is realized; storing the digital signature in the blockchain to realize online verification; and realizing hierarchical encryption of video frame data through control of a bit plane. According to the method,hierarchical encryption, digital signature embedding and verification can be carried out on an H.264 coded video; only one file needs to be stored, and the decryption effect of multiple definitions ofthe video can be achieved. By utilizing the method and the device, the video file can be encrypted, the content privacy is protected, meanwhile, a preview function is provided, and videos with different definitions can be obtained by decryption at different permission levels. Dual authentication mechanisms (online verification, offline verification) provide authenticity and integrity detection ofvideo files.

Description

technical field [0001] The invention belongs to the technical fields of video authentication, video encryption, block chain and information security, and specifically relates to video frame data authentication and video encryption methods. Background technique [0002] In today's era of rapid information development, smart surveillance cameras have become the best choice for many administrative agencies, companies and families to ensure security because of their functions such as remote monitoring and recording video; Communication and video dynamic authentication and other fields are more and more widely used, and the security problems of video data are also becoming more and more serious [1]. [0003] At present, the security problems of video stream data are intensifying, which mainly include: the insecurity of remote transmission of network video surveillance system, that is, the integrity, availability and confidentiality of data in the transmission process may be destr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/32H04L9/18H04L29/06H04N19/467H04N21/2347
CPCH04L9/3297H04L9/3247H04L9/3236H04L63/105H04L63/0457H04L63/205H04L9/065H04N21/2347H04N19/467H04L2209/608H04L9/50
Inventor 赵逸文苏明文周之刘晓光
Owner NANKAI UNIV
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