A Security Analysis of Captchas With Large Character Sets. - Ping Wang 027; Haichang Gao; Qingxun Rao; Sainan Luo; Zhongni Yuan; Ziyu Shi (IEEE Trans. Dependable Secur. Comput., 2021)

Defense Against Adversarial Attacks by Reconstructing Images. - Shudong Zhang; Haichang Gao; Qingxun Rao (IEEE Trans. Image Process., 2021)