Abstract The electronic passport, also known as e-Passport, includes an embedded integrated circuit (IC) chip to digitally and biometrically identify its holder. It allows immigration officials to verify the exact identity of travelers, thereby increasing the reliability of the authentication. However, the information stored in the IC chip is vulnerable to eavesdropping via wireless communication, resulting in leakage of personal information, as well as duplication, falsification, and forgery of the electronic passport. This paper proposes the consolidation of biometric data fields into a single data field to protect sensitive personal information and a biometric data protection algorithm, which protects the passport against loss and malicious eavesdropping attacks. The proposed algorithm creates an encrypted image by using a hash function to rearrange the biometric information, such as face, fingerprint, and iris images, and it then measures and evaluates the accuracy of the decrypted image.