RF-Ubia: User Biometric Information Authentication Based on RFID

Traditional authentication technologies usually perform identity authentication based on user information verification (e.g., inputting the password) or biometric information (e.g., fingerprints) for identity authentication. However, there are security risks when these authentication methods are applied solely. For example, if the password is compromised, it is unlikely to determine whether the user is legitimate based on the password. In this paper, we propose RF-Ubia, which combines user information and biometric features to double guarantee the security of identity authentication. The RF-Ubia is a user identification system composed of an array of nine passive tags and a commercial RFID reader, which firstly verifies the user’s password, and then identifies the biometric characteristics of the legitimate user. Due to the coupling effect among tags, any tag signal change caused by the user’s touch operation will affect other tag signals at the same time. Since each user has different fingertip impedance, their touch will cause a unique change of tag signal. Therefore, by combining biometric information, the tag array will uniquely identify users. Evaluations results show that RF-Ubia achieves excellent authentication performance with an average recognition rate of 92.8\({\%}\).