| 摘要 |
FIELD: information technologies.SUBSTANCE: method of biometric authentication of users consists in that a database of identification parameters of handwriting examples of users with access to an IT system is created in advance, then the user entering the access control system is suggested to make any writing of handwriting example, the received analogue signal is converted to digital form, forming an array of quantized counts, by values of its elements an array of coefficients is calculated, the elements of which are compared with the respective array elements of the registered users, and the user to be identified is deemed incidental to the reference record if this difference is minimum. After the analogue signal is converted into a digital form, an analogue signal jitter, the ratio of number of values of the analogue signal jitter exceeding the first threshold value to the total number of values of the analogue signal jitter are determined, the calculated ratio is compared with the second threshold value, in case the calculated relation doesn't exceed the second threshold value, the array of coefficients is calculated by means of two-dimensional discrete cosine conversion, otherwise the handwriting example is written again.EFFECT: reduction of probability of error of the first sort of user authentication when the user accessed the system, whose handwriting example parameters are available in the access control system database, is denied by the access control system.2 dwg |
