We study the covert communication over $K$ -user-pair discrete memoryless interference channels (DM-ICs) with a warden. It is assumed that the warden’s channel output distribution induced by $K$ “off” input symbols, which are sent when no communication occurs, is not a convex combination of those induced by any other combination of input symbols (otherwise, the square-root law does not hold). We derive the exact covert capacity region and show that a simple point-to-point based scheme with treating interference as noise is optimal. In addition, we analyze the secret key length required for the reliable and covert communication with the desired rates, and present a channel condition where a secret key between each user pair is unnecessary. The results are extended to the Gaussian case and the case with multiple wardens.

中文翻译：

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将干扰视为噪声是干扰通道上隐蔽通信的最佳选择

我们研究秘密通信 $ K $ 用户对带有监护人的离散无记忆干扰通道（DM-IC）。假设看守的信道输出分布是由 $ K $ 当没有通信发生时发送的“关闭”输入符号不是由输入符号的任何其他组合引起的那些符号的凸组合（否则，平方根定律不成立）。我们得出了确切的隐蔽容量区域，并表明将干扰视为噪声的基于点对点的简单方案是最佳的。另外，我们分析了以期望的速率进行可靠和隐蔽通信所需的密钥长度，并提出了在每个用户对之间不需要密钥的信道条件。结果扩展到高斯案例和具有多个监护人的案例。