Estimation of the Quality of Biometric Features in the Task of Formation a Cryptographic Key Based on Handwriting

Comparative analysis of the quality of groups of biometric parameters of handwriting is presented in the article. The input data for the biometric parameters are the coordinates of the position of the pen on the graphic tablet. The study used the SVC 2004 database of authentic handwritten signatures and high-quality forgeries of 40 users. For the purpose of conducting a comparative analysis, empirical data were collected based on handwritten records of 29 users, each of whom entered their own handwritten passphrase and a single passphrase for all in Russian. Special attention is paid to the methods of transformation of input biometric data and preparation of groups of biometric parameters. The transformation of the input data is carried out mainly using histograms, their normalization and resampling. The quality assessments of the identified groups of biometric parameters are presented, on the basis of which the most statistically significant groups are identified. The results of using the proposed conversion methods and comparative analysis of the quality of groups of biometric parameters indicate the possibility of their practical use for solving problems of improving developments in the field of biometric information security.