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Secure communication method based on feedback under MIMO eavesdropping channel

A technology for secure communication and eavesdropping channels, applied in the field of physical layer information security, to achieve the effect of improving the receiving signal-to-noise ratio, simple linear processing, and expanding feedback performance gain

Active Publication Date: 2017-07-21
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In MIMO technology, when the mutual distance between two receivers is greater than or equal to the wavelength, the MIMO channels are irrelevant. It is impossible for two receivers to fully know the channel characteristics of each other. possible

Method used

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  • Secure communication method based on feedback under MIMO eavesdropping channel
  • Secure communication method based on feedback under MIMO eavesdropping channel
  • Secure communication method based on feedback under MIMO eavesdropping channel

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Embodiment Construction

[0028] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0029] The present invention provides a feedback-based confidential communication method under MIMO eavesdropping channel, realizes the secure communication between the target user (represented by Bob) and the source end (represented by Alice) with N transmitting antennas, and prevents the eavesdropper (represented by Eve said) wiretapping. In the secure communication method, Alice as the receiving end optimizes the feedback p...

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Abstract

The invention provides a secure communication method based on feedback under a MIMO eavesdropping channel. The secure communication between a target user possessing N transmitting antennas and a source end is realized, and the eavesdropping of an eavesdropper is prevented. The secure communication method is characterized in that the feedback performance gain of the source end as the receiving end is optimized, so that the receiving signal-to-noise ratio of the source end is higher than the eavesdropper. The secure capacity of the MIMO eavesdropping channel is improved, not only can be the receiving signal-to-noise ratio of the legal receiving end improved, but also can be the feedback performance gain of the MIMO eavesdropping channel enlarged. A theoretical simulation experiment shows that the feedback performance gain is in a linear increasing relation along the increasing of the signal-to-noise ratio; and meanwhile, the theoretical simulation shows that the security gap between the legal receiving end using the protocol and the eavesdropping end is increased along the increasing of the transmitting antenna number and / or signal-to-noise ratio.

Description

technical field [0001] The invention relates to a secret communication method based on MIMO (multiple-input multiple-output) wiretapping channel, and belongs to the technical field of physical layer information security. Background technique [0002] The eavesdropping channel model proposed by Wyner in 1975 is the basic model of secure transmission in the physical layer. In this eavesdropping channel model, if the main channel has better channel conditions than the eavesdropping channel, it is possible to perform secure transmission at the physical layer, but how to effectively construct the eavesdropping channel model has always been an open problem. In Wyner's wiretapping channel model, the wiretapping channel needs to have higher noise than the legal channel, which is unrealistic in actual communication, so it is necessary to use the noise of the channel to establish a logical channel—that is, the wiretapping channel to achieve legal The channel has better channel charac...

Claims

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Application Information

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IPC IPC(8): H04L1/06
CPCH04L1/0643H04L1/0668H04L1/0687
Inventor 蒋学芹曹誉文孟玉白恩健吴赟杨义
Owner DONGHUA UNIV
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