一种改进的随机性模糊金库算法  

An Improved Randomness Fuzzy Vault Scheme

作　　者：刘艳涛[1] 游林[1] 

机构地区：[1]杭州电子科技大学通信工程学院,杭州310018

出　　处：《科技通报》2011年第2期288-292,共5页Bulletin of Science and Technology

基　　金：国家自然科学基金(NO.60763009)

摘　　要：模糊金库(fuzzy vault)算法作为目前较流行的一种指纹密钥技术,得到了人们越来越多的关注。本文基于原有模糊金库算法,提出了一种新的模糊金库算法,该算法中:首先,上锁时利用一组随机数建立一线性函数,函数的长度不再与密钥信息的长度有关;其次,引入伪随机序列发生器,以指纹特征值作为生成元,产生随机数组用于构建模糊金库;另外,本文还提出密钥分离思想,将密钥信息分别存储于上锁过程的两部分中,使密钥信息与用户身份更牢固的绑定在一起,由此获得更高的随机性和安全性。As a popular kind of fingerprint-key technology,the fuzzy vault scheme gets more and more attention. Based on the existing fuzzy vault algorithm ,this paper proposes a new algorithm of fuzzy vault. For the algorithm：First, using a group of random Numbers to establish a linear function when locking process, and the length of the function has no more relation to the key information：Secondly,introducing the pseudo random sequence generator,which takes fingerprint eigenvalues as generating element,generating random Numbers group used to construct fuzzy vault ：The last,this letter also proposed a concept of key separation,which means the key information would be divided into tow parts and saved isolated,by that we can make the key information and user identity firmer bind together,and gaining higher randomness and security.

关 键 词：指纹密钥 模糊金库 伪随机序列 安全性 随机性 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]