Yoichi Shibata Masahiro Mimura Kenta Takahashi Masakatsu Nishigaki A study on biometric key generation from fingerprints: Fingerprint-key generation from stable feature value. 45-51 2007 conf/csreaSAM/2007 Security and Management db/conf/csreaSAM/csreaSAM2007.html#ShibataMTN07