2022 6 1 Jun. 2022ANG Hongliang XU Rongbiao ， Faculty of Electric Power Engineering Kunming University of Science and Technology Kunming 650000 China （ ， ， ， ） The traditional fingerprint identification has security risks and the fingerprint information is vulnerable to theft. Abstract： ， Therefore the two ⁃ dimensional code technology chaotic encryption technology and fingerprint identification technology are ， ， combined the improved feature extraction algorithm and image encryption algorithm are used to preprocess the collected ， fingerprint images and the fingerprint features are extracted by 4 × 4 template search extraction method. And then the image ， ， encryption algorithm based on Logistic map and Sine ⁃ sine map is used to encrypt the image to generate the two ⁃ dimensional code. When identifying the two⁃dimensi
