Covert communication method based on video decoding electromagnetic leakage

A covert communication and video decoding technology, applied in the field of communication, can solve the problem that the video cannot be read

Active Publication Date: 2019-04-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case, if the video file is not obtained, the steganographic content in the video cannot be read using the existing video steganography technology

Method used

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  • Covert communication method based on video decoding electromagnetic leakage

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Embodiment Construction

[0024] The method of the present invention will be further described below in conjunction with the accompanying drawings.

[0025] The present invention provides a covert communication method based on video decoding electromagnetic leakage, especially a video steganography and reading method, which is different from traditional video steganography methods. Other devices with magnetometers are used to read the steganographic content of the video, so that the physical isolation of the network can be broken through when the steganographic content is read. The flow chart of video steganography and reading is as follows: figure 1 As shown, it mainly includes adding error correction codes, adding synchronization sequences, 2ASK (binary amplitude shift keying) modulation to generate video encoding information sequences, video encoding, video playback and magnetic signal acquisition, magnetic signal synchronization, filtering, 2ASK demodulation, Error correction code error correction...

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Abstract

The invention discloses a covert communication method based on video decoding electromagnetic leakage. A magnetic field leaked when a CPU works is used and the frame type and quantization parameter ofcertain frames of a video are changed, thereby changing the CPU occupancy rate when the video plays the corresponding frame, and steganographic information is leaked out through the magnetic field ofthe CPU. By adoption of the method in the invention, the video steganographic information is read without obtaining a video file, and only needing to collect a magnetic signal of the CPU with a smartphone or a magnetic sensor and recover the content of the video steganographic information from the signal when the video is played.

Description

technical field [0001] The invention belongs to the technical field of communication, relates to video steganography and magnetic field communication technology, in particular to a covert communication method based on video decoding electromagnetic leakage. Background technique [0002] The reading of the current video steganography technology needs to obtain video files. In some important places, physical isolation is usually used to ensure network security to prevent the leakage of sensitive information. For example, devices are prohibited from connecting to the wireless network, the internal private network is physically isolated from the Internet of Things, and visitors are prohibited from taking pictures, recording, videotaping, and operating sensitive devices. In this case, if the video file is not obtained, the steganographic content in the video cannot be read by using the existing video steganography technology. For occasions where video files cannot be obtained, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/467H04N21/835H04N21/234H04N21/44
CPCH04N19/467H04N21/234H04N21/44H04N21/835
Inventor 徐文渊冀晓宇张聚川
Owner ZHEJIANG UNIV
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