Your Keywords Know Each Other: Breaking SSE with <1% Leaked Documents

Mingyu Bian and Jiabei Wang, School of Cyber Science and Engineering, Nanjing University of Science and Technology，Nanjing, 210094; Dandan Xu, School of Cyber Science and Engineering, Nanjing University of Science and Technology; Guangyu Huang, School of Cyber Science and Engineering, Nanjing University of Science and Technology，Nanjing, 210094; Yongbin Zhou, Nanjing University of Science and Technology