1. González-Agulla E, Argones-Rúa E, García-Mateo C, Flórez ÓWM (2004) Development and implementation of a biometric verification system for e-learning platforms, EDUTECH, computer-aided design meets computer-aided learning. In: IFIP 18th world computer congress, pp 155–164
2. Guven O, Akyokus S, Uysal M, Guven A (2007) Enhanced password authentication through keystroke typing characteristics. In: Proceedings of the 25th IASTED international multi-conference: artificial intelligence and applications, pp 317–322
3. Kumlander D (2008) Soft biometrical students identification method for e-Learning. In: Sobh T (ed) Advances in computer and information sciences and engineering. Springer, Netherlands, pp 114–118
4. Jain AK, Ross A, Prabhakar S (2004) An introduction to biometric recognition. IEEE Trans Circuits Syst Video Technol 14(1):4–19
5. Jain AK, Hong L, Pankanti S (2000) Biometric identification. Commun ACM 43(2):91–98