A secure transmission method of sequence cipher encryption based on artificial noise in 5G communication system
A technology of sequence cipher and communication system, applied in the field of secure transmission of sequence cipher encryption based on artificial noise, can solve the problems of security performance gain, downlink estimation error accumulation, unbalanced uplink and downlink security capacity, etc., and achieves information transmission guarantee and confidentiality. Information transmission security, the effect of strengthening security
Active Publication Date: 2019-12-24
XI AN JIAOTONG UNIV
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Problems solved by technology
[0004] In terms of the existing physical layer security transmission technology, in the patent "Uplink Security Transmission Method Based on Downlink Feedback Assistance in 5G Communication System", a method of uplink security transmission based on downlink feedback assistance is proposed to solve the existing problems. The physical layer security transmission technology cannot be directly applied to the 5G uplink communication system, or can only bring limited security performance gains
Although this method can solve the problem of unbalanced uplink and downlink safety capacity to a certain extent, there is a situation where the downlink estimation error accumulates to the uplink.
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[0029] In the specific implementation of the present invention, the number of base station node antennas M=8. Secure transmission means that the information transmitted by the base station node can only be received by the expected user Bob and extract useful information, while the eavesdropping user cannot extract useful information from the received signal. Eavesdropping users only do passive eavesdropping and do not transmit signals. In addition, when the channel changes slowly, the reciprocity of the channel can be fully guaranteed through the transmission mode of time division duplex. The implementation mode includes the following steps:
[0030] Assume that Alice and Bob have a length N and negotiated key K in their caches. o , and make the base station node Alice and the user node Bob update the key K synchronously through key agreement o .
[0031] Step 1. Before transmitting security information, single-antenna user node Bob (single-antenna user Bob in the figure) ...
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The invention discloses an encrypted safe transmission method for a sequential cipher based on an artificial added noise in a 5G communication system. In an uplink time slot step, a single antenna user delivers a pilot frequency sequence and a negotiation result and an encrypted massage of a secret key; then, a base station side finishes an acceptance of a signal and updates the secret key; finally, the base station side adds the artificial added noise into the encrypted massage to form a mixed signal and delivers the mixed signal to a user premise and the user premise receives the mixed signal. According to a generating algorithm of the sequential cipher, the encrypted safe transmission method uses the 'secret key' to form the sequential cipher, and then uses the sequential cipher encrypts the encrypted massage and updates the secret key continuously matched with the secret key negotiation, thus a hacking node cannot track a change of the secret key.
Description
technical field [0001] The invention relates to a secure transmission method of a wireless communication system, in particular to a secure transmission method of sequence cipher encryption based on artificial noise in a 5G communication system. Background technique [0002] Wireless communication uses radio signals as the carrier of information, and gets rid of the shackles of wired communication on the location of communication terminals. It has quickly gained popularity due to its flexibility and portability, and has achieved rapid development in the past ten years. However, with the development and application of wireless communication technology becoming more and more common, security issues in the communication process are gradually exposed. While wireless communication brings convenience to people, the openness of wireless channels caused by the broadcasting characteristics of electromagnetic waves. This kind of openness on the physical layer makes the security of wir...
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IPC IPC(8): H04L9/06H04L9/08
CPCH04L9/0656H04L9/0822
Inventor 王文杰赵林生李帆高泽伟邵继旺
Owner XI AN JIAOTONG UNIV