基于喷泉码的防窃听编码设计

Design of anti-eavesdropping code based on fountain codes

针对无线通信的安全性,提出一种与物理层喷泉码编码相结合的防窃听方法。利用增加人工噪声破坏窃听者喷泉码M P译码顺序,在保证主信道正常通信情况下,大幅度增加了窃听者的误码率,使其难以正常窃取信息,达到保证主信道通信安全的目的。实验结果表明,该方法在增加少量人工干扰噪声的情况下,使得窃听者的误码率达到30%~50%以上,达到防止窃听目的。

An anti-eavesdropping method with the fountain codes embedded in the physical layer is introduced to aim at the security of wireless communication. The artificial noise is used to damage the rule in MP decoding of fountain codes and make it more difficult to steal information on the premise of ensuring the communication security of the main channel. The experimental result shows that,under the condition of a small amount of artificial interference noise,this method can increase the BER of the eavesdropper by30% to 50%,the purpose of preventing eavesdropping is to be achieved.