In order to counter the double attack with wardens and eavesdroppers in the practical scenario, a distributed transmission scheme with security and covertness is proposed, which combines coding techniques and transmis...
详细信息
In order to counter the double attack with wardens and eavesdroppers in the practical scenario, a distributed transmission scheme with security and covertness is proposed, which combines coding techniques and transmission protocol. The covert message is encoded by rateless codes and transmitted embedded in normal frames. The security is based on the random essence of rateless coding, and the covertness is achieved by ignoring the error frames and maintaining the signal waveform. The inter-collusion between multiple wardens and eavesdroppers greatly increases the potential security hazards, which is first discussed in this paper. The authors can counter the inter-collusion attack by adjusting the ratio of covert frame transmission in the distributed transmission scheme with security and covertness. Compared with the related work, this paper has many advantages, such as good robustness, lower extra complexity, and the insurance of the performance for both normal message and covert message. The analysis and simulation results show that our distributed transmission scheme with security and covertness can achieve both covertness and security based on the effective design under the existing communication system.
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