In this article, we focus on a new concept called multichannel steganography, in which a sender is able to transmit different secret data to multiple receivers via the same cover image. First, we propose a general framework to achieve multichannel steganography based on modern steganographic paradigm. Then, we design two schemes to, respectively, achieve separable and sequential multichannel steganography with the proposed framework. In the separable scheme, a receiver can extract secret data for him/her using the corresponding data hiding key. For other parts of secret data, the receiver cannot affirm the existence and, therefore, cannot extract them. In the sequential scheme, the multiple receivers are dependent. The receiver with the highest priority can extract data first. After that, the receiver with the second priority can extract data when authorized by the highest priority receiver, and so on. In addition, the two schemes achieve multichannel steganography without decreasing the undetectability of steganography.

中文翻译：

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用于多个接收器的数字图像中的多通道隐写术

在本文中，我们集中于一个称为多通道隐写术的新概念，其中发送者能够通过同一封面图像将不同的秘密数据发送到多个接收者。首先，我们提出了一个基于现代隐写术范式实现多通道隐写术的通用框架。然后，我们设计了两种方案，分别通过所提出的框架来实现可分离和顺序的多通道隐写术。在可分离方案中，接收者可以使用相应的数据隐藏密钥为他/她提取秘密数据。对于机密数据的其他部分，接收者无法确认其存在，因此无法提取它们。在顺序方案中，多个接收器是相关的。具有最高优先级的接收器可以首先提取数据。之后，具有第二优先级的接收器可以在获得最高优先级的接收器授权后提取数据，依此类推。另外，这两种方案实现了多通道隐写术，而不会降低隐写术的不可检测性。