Comment: cryptanalysis of Lee-Hwang-Li's key authentication scheme. - Da-Zhi Sun; Zhen-Fu Cao; Yu Sun 023 (Appl. Math. Comput., 2005)

Remarks on a new key authentication scheme based on discrete logarithms. - Da-Zhi Sun; Zhen-Fu Cao; Yu Sun 023 (Appl. Math. Comput., 2005)

Weakness and improvement on Wang-Li-Tie's user-friendly remote authentication scheme. - Da-Zhi Sun; Ji-Dong Zhong; Yu Sun 023 (Appl. Math. Comput., 2005)

How to compute modular exponentiation with large operators based on the right-to-left binary algorithm. - Da-Zhi Sun; Zhen-Fu Cao; Yu Sun 023 (Appl. Math. Comput., 2006)

The geographic concentration of China's e-business enterprises: where they gather and why. - Yu Sun 023; Xingxuan Kuang; Da-Zhi Sun (Electron. Mark., 2016)