Biometric passport is a kind of passport with miniature RFID contactless chip, which contains the biometric information of the holder. Biometric functions such as face recognition or signature can be used to prove the identity of the holder of travel documents. The contactless chip of electronic passport has digital signature to ensure the integrity of biometric data and passport. At present, biometrics includes face recognition, fingerprint recognition and iris scanning. An electronic chip is embedded in the cover or page of a traditional passport, which stores the holder's personal information such as name, gender, date of birth, photo image and fingerprint.