Secure access microcontroller system based on fingerprint template with hyperchaotic encryption

Authentication systems based on biometric and microcontroller systems are used around the world to control the access of users in restricted sites such as in offices, banks, or hospitals. Moderns authentication systems use cloud connectivity using the Internet. Nevertheless, biometric data are considered confidential, which is susceptible to hacker attacks with the aim of fraud, extortion or identity theft. In this work, we propose a low-cost secure control access microcontroller system that uses the Secure Hash Algorithm 1 (SHA-1) and hyperchaotic encryption of fingerprint template to increase the security against cybernetic attacks. The main findings can be briefly described as (1) chaotic encryption of the fingerprint template provides strong security by using the hyperchaotic 2D Lotka-Volterra map with just one round of diffusion-confusion; (2) the fingerprint template injected to SHA-1 increases the robustness against differential attack by combining a unique 160-bit hash key with the personal key; (3) the authentication system implemented in a low-cost embedded system based on 32-bit microcontroller provides high security at low cost; (4) several security analysis of data generated in the embedded authentication system validates the effectiveness of proposed scheme. Based on the high security level achieved in proposed authentication scheme, the system provides double padlock in secure access biometric systems providing robustness against malicious attacks, avoid identity theft and the unauthorized access in highly restricted areas.