公开(公告)号：CZ20012673A3

公开(公告)日：2002-02-13

申请号：CZ20012673

申请日：2000-01-26

Applicant: IBM

Inventor： MATYAS STEPHEN MACHAEL JR ,  PEYRAVIAN MOHAMMAD

IPC: G06F21/00 ,  H04L9/08 ,  H04L9/32 ,  G06F1/00

Abstract: Key-dependent sampling of a biometric characteristic is performed at a client, to thereby generate key-dependent biometric data samples. The key-dependent biometric data samples are then transmitted from the client to a server. By sampling the biometric characteristic at the client in a key-dependent manner, the key-dependent biometric data samples may be transmitted from the client to the server without the need for additional encryption and/or a signature. A key is preferably transmitted from the server to the client. The key is then used to perform the key-dependent sampling of the biometric characteristic at the client. The key-dependent sampling may be performed by sampling the biometric characteristic at a sampling frequency that is a function of the key. Alternatively, the key can be applied to the sampled biometric data, to thereby generate the key-dependent biometric data samples that are a function of the key. The key is preferably used to perform nonlinear key-dependent sampling of the biometric characteristic at the client, for example by using the key to determine the sampling frequency and also using the key to apply a nonlinear function to the sampled biometric data. Further encryption of the biometric data and/or the use of a signature with the biometric data need not be performed.