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With the development of the information age, people have higher and higher requirements for the protection of their belongings. Biometric identification technology, as a new and rapidly developing technology, plays an increasingly prominent role in protecting people's information security. With the different research progress of information matching and extraction algorithms, the development of various types of identification technology is also different. So as to provide effective protection for people's information security, that biometric identification technology is applied in which industries? Biometric identification is mainly a technology for identity authentication through human biometric features. Human biological features are usually unique, can be measured or automatically identified and verified, and can be inherited or remain unchanged throughout life, so biometric authentication technology has great advantages over traditional authentication technology. Biometric identification systems sample biometric features, extract their unique characteristics, and convert them into a digital code, and the digital code further forms a feature template. Due to the unique and irreproducible characteristics of the human body, this biometric key cannot be copied, stolen or forgotten, and the identification uses biometric identification technology, which is safe, reliable and accurate.