Enter your PIN code securely!: utilization of personal difference of angle kappa

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@inproceedings{Sakai2016EnterYP, title={Enter your PIN code securely!: utilization of personal difference of angle kappa}, author={Daiki Sakai and Michiya Yamamoto and Takashi Nagamatsu and Satoshi Fukumori}, booktitle={ETRA}, year={2016} }