Data hiding is referred to as the art of hiding secret data into a digital
cover for covert communication. In this letter, we propose a novel method to
disguise data hiding tools, including a data embedding tool and a data
extraction tool, as a deep neural network (DNN) with an ordinary task. After
training a DNN for both style transfer and data hiding, while the DNN can
transfer the style of an image to a target one, it can be also used to hide
secret data into a cover image or extract secret data from a stego image by
inputting the trigger signal. In other words, the tools of data hiding are
hidden to avoid arousing suspicion.

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