METHOD AND DEVICE FOR PREPARING DATA, AND METHOD AND SYSTEM FOR COLLATING DATA

摘要

PROBLEM TO BE SOLVED: To provide a system with an excellent security function for identifying an individual with fewer data and at a low cost while preventing a third person from reading the data. SOLUTION: Two different image data D1 and D2 are binary coded by using prescribed thresholds based on a series of voiceprints (refer to Step S1). The binary coded image data are superposed (refer to Step S2), the area rate and direction of the superposed part of the superposed image D3 are appropriately set, and logical operation processes such as AND, EX-OR and OR are executed to make one set of superposed image data (refer to Step S3). Next, the obtained image data are compressed (refer to Step S4), and requested digital data Dp1 are produced (refer to Step S5). The obtained data are stored in a recording medium, and by collating the data obtained in the same method as mentioned above with the data directly collected from the individual, the individual is identified.