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From the defender's point of view, this type of attack has proved (so far) to be very problematic, because we do not have effective methods to defend against this type of attack. Fundamentally speaking, we do not have an effective way for DNN to produce good output for all inputs. It is very difficult for them to do so, because DNN performs nonlinear/nonconvex optimization in a very large space, and we have not taught them to learn generalized high-level representations. You can read Ian and Nicolas's in-depth articles (http://www.cleverhans.io/security/privacy/ml/2017/02/15/why-attaching-machine-learning-is-easier-than-defending-it.html) to learn more about this.他盖上茶盏，问黑汉子道：这孩子哪来的？黑汉子忙赔笑道：老爷，这娃儿是小的前儿从外边回来的时候，从狼嘴里救下来的。2014年5月16日-6月1日，亮相CCTV8（中央电视台电视剧频道）《家庭剧场》。Money reward: 850现代都市喜剧《男人不醉》，讲述了四对生活在上海的八零后男女，他们会如何面对平地起波澜的感情生活？他们如何面对背叛与谎言？生命在于折腾，快来一起愉快地折腾吧！Hockey