An optical authentication system based on encryption technique and multimodal biometrics

A major concern nowadays for a biometric credential management system is its potential vulnerability to protect its information sources. To prevent a genuine user's templates from both internal and external threats, a novel and simple method combined optical encryption with multimodal biometric authentication technique is proposed. In this method, the standard biometric templates are generated real-timely by the verification keys owned by legal user so that they are unnecessary to be stored in a database. Compared with the traditional recognition algorithms, storage space and matching time are greatly saved. In addition, the verification keys are difficult to be forged due to the utilization of optical encryption technique. Although the verification keys are lost or stolen, they are useless for others in absence of the legal owner's biometric. A series of numerical simulations are performed to demonstrate the feasibility and performance of this method. •A novel and simple method combined optical encryption with multimodal biometric authentication technique is proposed.•In this method, the storage space and matching time are greatly saved.•The verification keys are difficult to be forged.•Although the verification keys are lost or stolen, they are useless for others in absence of the legal owner's biometric.