Keyed Polar Coding for Physical-Layer Security without Channel State Information
Keyed Polar Coding for Physical-Layer Security without Channel State Information
复制标题
DOI：
10.1109/icc42927.2021.9500357
复制
发表时间：
2021-06
期刊：
影响因子：
--
通讯作者：
Thyago M. S. Pinto;J. Vilela;M. Gomes;Willie K. Harrison
中科院分区：
文献类型：
--
作者：
Thyago M. S. Pinto;J. Vilela;M. Gomes;Willie K. Harrison
极化码已被证明为在各种窃听信道上实现物理层安全提供了一种有效的机制。这些方案中的大多数在编码器处都需要预期接收者和窃听者的信道状态信息（CSI）。在本文中，我们考虑一种在高斯窃听信道上无CSI可用时的保密极化编码方案。我们表明，友好双方之间共享密钥流的可用性使得极化码可用于安全和可靠的通信，即使窃听者知道密钥流的很大一部分。该方案依赖于一种预定策略，即将待编码的比特划分为一组冻结比特和一组信息比特。冻结比特用密钥流中的比特填充，并且我们在窃听信道模型中的两个接收端都使用循环冗余校验辅助的连续消除列表解码器时评估了安全差距。
Polar codes have been shown to provide an effective mechanism for achieving physical-layer security over various wiretap channels. A majority of these schemes require channel state information (CSI) at the encoder for both intended receivers and eavesdroppers. In this paper, we consider a polar coding scheme for secrecy over a Gaussian wiretap channel when no CSI is available. We show that the availability of a shared keystream between friendly parties allows polar codes to be used for both secure and reliable communications, even when the eavesdropper knows a large fraction of the keystream. The scheme relies on a predetermined strategy for partitioning the bits to be encoded into a set of frozen bits and a set of information bits. The frozen bits are filled with bits from the keystream, and we evaluate the security gap when the cyclic redundancy check-aided successive cancellation list decoder is used at both receivers in the wiretap channel model.