<p>With the rapid advancement in information transmission technology, the challenges for preventing information from compromising are also increasing. To maintain confidentiality, integrity, and trust in digital communication, securing data is essential. Biometric based optical technique is one of the method for safeguarding personal and sensitive information. In the proposed method, firstly Quick Response (QR) code is generated from the input image. The generated QR code is then encoded using a modified double random phase encoding technique in the gyrator domain. A chaotic map is utilized to generate a binary random mask which refers as binary key for the technique. A XOR operation is performed between the generated QR code and this binary key. The obtained data is transformed to the spatial frequency domain by the application of gyrator transform. The data in this domain is encoded by a random phase mask also generated by a chaotic map. This is then subjected to second gyrator transform. This encoded data can be transmitted through the insecure channels to the receiver. Instead of providing the encryption key to the receiver directly, the same is linked to the user’s biometric. The encryption key is retrieved at the receiver end using the biometric information of the user. The retrieved key will then be used to decrypt the transmitted encrypted data. The decoding will be possible only when the biometric of the authentic person is used for decryption. The proposed technique not only provides authentication while retrieving data but will also solve the problem of managing key while transmitting. Simulation results confirm the effectiveness of the proposed algorithm and its robustness is illustrated by calculating signal to noise ratio, mean square error and correlation coefficient.</p>