The Scale-free Network of Passwords : Visualization and Estimation of Empirical Passwords. - Xiujia Guo; Haibo Chen; Xuqin Liu; Xiangyu Xu; Zhong Chen 001 (CoRR, 2015)

Exploring the Network of Real-World Passwords: Visualization and Estimation. - Xiujia Guo; Zhao Wang; Zhong Chen 001 (SecureComm, 2017)