基于指纹自动配准的多重控制模糊金库方案

Multiple-control fuzzy vault based on auto-aligned fingerprint

模糊金库是一种绑定生物特征和密钥的典型加密框架,与指纹结合可作为一种生物加密系统.但是,在指纹模糊金库实现中,多数方案针对单一指纹模板,匹配时需要提前配准.针对这些局限性,提出一种基于指纹自动配准的多重控制模糊金库,采用多个指纹对系统的秘密信息进行不同程度的控制,并运用几何哈希技术,变换指纹信息,使之不再以原始状态存储,同时实现自动配准.实验结果分析表明,所提出的方案在匹配度,攻击复杂度方面都有较好的性能,使具有不同安全级别的系统更加可靠.

Fuzzy Vault is a typical encryption framework which binds biological characteristics and key. Combined with fingerprint, Fuzzy Vault can be used as a biometric encryption system. However, most of the fuzzy fingerprint vault implementations only included single fingerprint template, and the features need to be pre-ali ligned fingerprint tiple fingerprint t gned. According to these is proposed, which can co limitations, a multiple-control fuzzy ntrol keys of application system in dif emplates, and use geometric hashing tec vault based on au ferent degrees by to-a- hnique to transform fingerprint, achieve auto- state. The analysis of experimental results in- to matching, attack complexity and makes the matic alignment and store fingerprint without its original dicates that the proposed scheme has better performance i application system with different level of security be more reliable.