System and method for verifying user by security token combined with biometric data processing techniques

A non-transitory computer-readable recording medium storing a computer program configured to be executed by one or more hardware processors, to perform a user verifying method by a security token combined with biometric information processing techniques, the computer program being configured to execute:

• receiving an enrollment request signal including biometric information for enrollment from a user terminal;
• extracting feature information from the biometric information for the enrollment and biometric information of a plurality of other persons;
• embedding the feature information extracted from the biometric information for the enrollment and the biometric information of the plurality of other persons;
• generating a first key composed of a random binary string;
• generating projection parameters by performing high-dimensional mapping to the result of said embedding the feature information for the enrollment, wherein said performing high-dimensional mapping is performed by using Random Fourier Feature Mapping (RFFM);
• determining hyperplanes using Linear Support Vector Machine (Linear SVM) such that each of the hyperplanes classifies the result of said performing high-dimensional mapping to match with each bit value of the first key, wherein the number of hyperplanes equals to the number of bits of the first key;
• obtaining decision hyperplane parameters of the determined hyperplanes;
• storing the projection parameters and the decision hyperplane parameters;
• generating a first template by applying a cryptographic hashing function to the first key;
• storing the generated first template;
• receiving a verification request signal including biometric information for verification from the user terminal;
• extracting feature information from the biometric information for the verification;
• embedding the feature information extracted from the biometric information for the verification;
• generating a second key corresponding to the first key based on the embedding result;
• generating a second template by applying the cryptographic hashing function to the second key;
• comparing the first template with the second template;
• and
• completing user verification based on the comparison result.

A server performing a user verifying method, the server comprising:

• a memory;
• one or more hardware processors configured to:
• when an enrollment request signal including biometric information for enrollment is received from a user terminal,
• extract feature information from the biometric information for the enrollment and biometric information of a plurality of other persons;
• embed the feature information extracted from the biometric information for the enrollment and the biometric information of the plurality of other persons;
• generate a first key composed of a random binary string;
• generate projection parameters by performing high-dimensional mapping to the result of said embed the feature information for the enrollment, wherein said performing high-dimensional mapping is performed by using Random Fourier Feature Mapping (RFFM);
• determine hyperplanes using Linear Support Vector Machine (Linear SVM) such that each of the hyperplanes classifies the result of said performing high-dimensional mapping to match with each bit value of the first key, wherein the number of hyperplanes equals to the number of bits of the first key;
• obtain decision hyperplane parameters of the determined hyperplanes;
• store the projection parameters and the decision hyperplane parameters in the memory;
• and
• generate a first template by applying a cryptographic hashing function to the first key;
• store the generated first template in the memory;
• when a verification request signal including biometric information for the verification is received from the user terminal,
• extract feature information from the biometric information for verification;
• embed the feature information extracted from the biometric information for the verification;
• generate a second key corresponding to the first key based on the embedding result;
• generate a second template by applying the cryptographic hashing function to the second key;
• compare the first template with the second template;
• and
• complete user verification based on the comparison result.