| 基于比特串异或和置乱变换的指纹模板保护算法 |
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| 引用本文： | 党力,张雪锋,惠妍.基于比特串异或和置乱变换的指纹模板保护算法[J].自动化学报,2020,46(12):2681-2689. |
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| 作者姓名： | 党力 张雪锋 惠妍 |
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| 作者单位： | 1.西安邮电大学网络空间安全学院 西安 710121 |
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| 基金项目： | 国家自然科学基金(61301091), 陕西省自然科学基础研究计划青年项目(2017JQ6010)资助 |
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| 摘 要： | 针对现有指纹模板保护算法存在的准确性较低、安全性能较差的问题, 提出一种基于比特串异或和置乱变换的指纹模板保护算法. 该算法在已有二维映射算法的基础上, 对得到的比特串进行异或和随机索引置乱变换, 有效地将线性和非线性变换相结合, 扩展了密钥空间, 增强了指纹模板的安全性. 理论分析和仿真结果表明, 对于密钥泄露场景, 该算法在数据库FVC2002 DB1和DB2中的等错误率(Equal error rate, EER)分别为0.08 %和0.75 %, 与现有算法相比, 具有较好的准确性和安全性.
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| 关 键 词： | 指纹模板 安全性 比特串 异或 置乱 |
| 收稿时间： | 2019-01-04 |
Fingerprint Template Protection Algorithm Based on Bit String XOR and Scrambling Transformation |
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| Affiliation: | 1.School of Cyberspace Security, Xi'an University of Posts and Telecommunications, Xi'an 710121 |
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| Abstract: | Aiming at the problems of low accuracy and poor security performance of the existing fingerprint template protection algorithm, A fingerprint template protection algorithm based on bit string XOR and scrambling transformation is proposed. Based on the existing two-dimensional mapping algorithm, the algorithm performs XOR and random index scrambling transformation on the obtained bit string, the algorithm effectively combines linear and nonlinear transformations, thereby expanding the key space and enhancing the security of the fingerprint template. Theoretical analysis and simulation results show that for the key leakage scenario, the equal error rate (EER) of the algorithm in the database FVC2002 DB1, DB2 is 0.08 % and 0.75 %, respectively, compared with existing methods, it has better accuracy and security. |
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