1. Ferguson, N., Schneier, B.: Practical Cryptography. John Wiley & Sons, NJ, USA (2003)
2. Schneier, B.: The Uses and Abuses of Biometrics. Communications of the ACM vol. 42, pp. 136 (1999)
3. Maltoni, D., Maio, D., Jain, A.K., Prabhakar, S.: Handbook of Fingerprint Recognition. Springer, Berlin (2003)
4. The Guardian (17 Nov. 2006) Cracked it!
5. Cavoukian, A.: Privacy and Biometrics, In Proceedings of the Intertnational Conference on Privacy and Personal Data Protection, Hong Kong, China (1999)