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Yige Liu, Yiwei Lou, Che Wang, Yongzhi Cao, and Hanpin Wang are with the Key Laboratory of High Confidence Software Technologies (Peking University), Ministry of Education; School of Computer Science, Peking University, Beijing, China. (e-mail: yige.liu@stu.pku.edu.cn; cyfqylyw@gmail.com; wangche02@gmail.com; caoyz@pku.edu.cn; whpxhy@pku.edu.cn)Yongzhi Cao is also with the Zhongguancun Laboratory, Beijing, China.Corresponding author: Yongzhi Cao
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Trigger-based defenses offer a false sense of security in federated learning, as this new attack shows backdoors can be implanted without any explicit triggers, achieving 2-50x better performance than trigger-based attacks.
