The following publications are possibly variants of this publication:
- Comments on five smart card based password authentication protocolsYalin Chen, Jue-Sam Chou, Chun-Hui Huang. iacr, 2010:148, 2010. [doi]
- Enhanced authentication protocol for session initiation protocol using smart cardWenxia Zhu, Jianhua Chen, Debiao He. ijesdf, 7(4):330-342, 2015. [doi]
- Two Improved Multi-server Authentication Protocols Based on Hash Function and Smart CardQi Xie, Deren Chen. jnw, 5(12):1434-1441, 2010. [doi]