arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1506.02152cs.ITmath.IT
收藏

信道增益不对称的安全双向中继嵌套格码

Nested Lattice Codes for Secure Bidirectional Relaying with Asymmetric Channel Gains

Shashank Vatedka, Navin Kashyap

摘要:

安全双向中继的基本问题涉及两个用户谁想要交换消息通过中间的“诚实,但好奇”中继节点。用户之间没有直接的链接,所有通信都必须通过中继节点进行。用户节点和中继之间的链路是具有高斯噪声的无线链路。要求用户的消息对中继保持安全。在以前的工作中,我们提出了基于嵌套格的编码方案,假设从两个用户节点到中继的信道增益是相同的。我们还分析了使用我们的编码方案进行安全可靠的消息交换的功率速率权衡。在本文中,我们扩展我们以前的工作的情况下,当信道增益不一定是相同的,并且已知的中继节点,但可能不对用户。我们表明,使用我们的计划,完美的保密性,可以得到只有某些值的信道增益,并分析在这些情况下的功率速率权衡。我们也对我们的强安全方案进行了类似的观察。

英文摘要:

The basic problem of secure bidirectional relaying involves two users who want to exchange messages via an intermediate "honest-but-curious" relay node. There is no direct link between the users, all communication must take place via the relay node. The links between the user nodes and the relay are wireless links with Gaussian noise. It is required that the users' messages be kept secure from the relay. In prior work, we proposed coding schemes based on nested lattices for this problem, assuming that the channel gains from the two user nodes to the relay are identical. We also analyzed the power-rate tradeoff for secure and reliable message exchange using our coding schemes. In this paper, we extend our prior work to the case when the channel gains are not necessarily identical, and are known to the relay node but perhaps not to the users. We show that using our scheme, perfect secrecy can be obtained only for certain values of the channel gains, and analyze the power-rate tradeoff in these cases. We also make similar observations for our strongly-secure scheme.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑