可复用手掌纹脉双源密钥多域复合提取技术研究

生物特征密钥认证技术互补了生物特征和密码学的双重优势，代表了当前认证技术领域的前沿方向和发展趋势。针对现有掌纹和掌脉密钥认证技术中的密钥复用性、双源密钥多域复合的有效提取、容错开销庞大、原始特征隐私性等问题，本项目结合生物特征认证、模板保护及密钥生成等理论和方法，提出可复用手掌纹脉双源复合密钥的概念，并研究相应的实用化多域复合提取框架。主要研究内容包括：1、降低容错开销的手掌纹脉双源特征约简和组合模式优化；2、基于用户特征和口令的双因不可逆变换的手掌纹脉模板保护技术；3、基于可撤销手掌纹脉特征的可复用密钥提取和认证方案；4、双源模式下可复用手掌纹脉复合密钥的多域提取和认证。本项目取得的预期创新成果将丰富和发展可复用双源复合密钥认证的理论和方法，扩展生物特征认证的应用范围，对相关领域的研究也具有重要的理论参考意义和丰富的借鉴价值。

Biometric key authentication plays complementary advantages of both biometrics and cryptography, which is the cutting-edge direction and development trend of the current authentication technologies. However, several problems exist in palmprint and palmvein key authentication systems, including the reusability of biometric key, the effective extraction of dual-source compound key in multi-domain, great fault-tolerant costs, the privacy of original biometrics, etc. To address the aforementioned problems, combining the theories and technologies of biometric authentication, biometric template protection and biometric key generation, this project proposes the concept of reusable compound key extracted from dual-source of palm-print-vein, and attempts to develop the corresponding practical framework of compound extraction in multi-domain. The main research contents include: 1) Reduction and combination mode optimization of dual-source feature of palm-print-vein for fault-tolerant cost suppression; 2) Palm-print-vein template protection based on dual-factor non-invertible transform fusing users' features and tokens; 3) Reusable key extraction and authentication based on cancelable palm-print-vein features; 4) Extraction and authentication of reusable compound key extracted from dual-source of palm-print-vein in multi-domain. The innovative and original contributions of this project will enrich and boost the authentication theory and technology of reusable dual-source compound key. Moreover, this project will broaden the application range of biometric authentication and provide the related research with important theoretical meaning and abundant reference values.