In this paper, we consider a common unicast beamforming network where Alice utilizes the communication to Carol as cover and covertly transmits message Bob without being recognized by Willie. We investigate beamformer design of maximize covert rate when has either perfect or imperfect knowledge about Willie's channel state information (WCSI). For WCSI case, problem is formulated under constrain...

Deep learning models hold state-of-the-art performance in many fields, but their vulnerability to adversarial examples poses a threat ubiquitous deployment practical settings. Additionally, inputs generated on one classifier have been shown transfer other classifiers trained similar data, which makes the attacks possible even if model parameters are not revealed adversary. This property of tran...