The following publications are possibly variants of this publication:
- Cryptanalysis of "A Robust Smart-Card-Based Remote User Password Authentication Scheme"S. Kumari, F. Bin Muhaya, Muhammad Khurram Khan, R. Kumar. isbast 2013: 247-250 [doi]
- An enhanced smart card based remote user password authentication schemeXiong Li, Jianwei Niu, Muhammad Khurram Khan, Junguo Liao. jnca, 36(5):1365-1371, 2013. [doi]
- Design of a user anonymous password authentication scheme without smart cardSaru Kumari, Muhammad Khurram Khan, Xiong Li, Fan Wu. ijcomsys, 29(3):441-458, 2016. [doi]
- More secure smart card-based remote user password authentication scheme with user anonymitySaru Kumari, Muhammad Khurram Khan. scn, 7(11):2039-2053, 2014. [doi]
- Cryptanalysis and improvement of 'a robust smart-card-based remote user password authentication scheme'Saru Kumari, Muhammad Khurram Khan. ijcomsys, 27(12):3939-3955, 2014. [doi]