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    • 1. 发明申请
    • METHOD OF MASKING A DIGITAL DATUM, SUCH AS A BIOMETRIC PRINT
    • 数字数据采集方法,如生物印刷
    • WO2005111915A3
    • 2006-08-10
    • PCT/EP2005052151
    • 2005-05-11
    • GEMPLUS CARD INTNACCACHE DAVIDBRIER ERICCORON JEAN-SEBASTIENCARDONNEL CEDRIC
    • NACCACHE DAVIDBRIER ERICCORON JEAN-SEBASTIENCARDONNEL CEDRIC
    • H04L9/32G06K9/00G06K9/62G07C9/00
    • G07C9/00087
    • The invention relates to a method of masking a plain datum b having n bits. The inventive method is characterised in that a masked datum m is produced using the following masking function: (I), wherein p is a prime number, b i is the bit at position i of plain datum b, and q i is the prime number at position i in a set of prime numbers (q 1 , ..., q n ). The invention also relates to a method of masking a biometric print, consisting in: determining a set of s real minutiae which are characteristic of the print; mixing and arranging the real minutiae with t false minutiae; and forming a mixed biometric datum b having n = s + t bits, such that, for any i: b i = 1 if position i corresponds to a real minutia, and b i = 0 if position i corresponds to a false minutia. The invention can be used to secure a security document such as a bank cheque.
    • 本发明涉及一种掩蔽具有n位的普通数据b的方法。 本发明的方法的特征在于,使用以下掩蔽函数产生掩蔽的数据m:(I)其中p是素数,b是平原数据b的位置i处的位, q 1是素数集(q 1,...,q n n)中的位置i处的素数。 本发明还涉及一种掩蔽生物识别印刷品的方法,其包括:确定作为印刷特征的一组真实细节; 混合和安排真实细节与虚假细节; 以及形成具有n = s + t个比特的混合生物测定数据b,使得对于任何i:b i i = 1,如果位置i对应于实际细节, 如果位置i对应于虚拟细节,则SUB> = 0。 本发明可用于确保诸如银行支票之类的证券文件。