Некоторые подходы к оценке информативности параметров идентификации пользователя по клавиатурному почерку на основе поведенческой биометрии

Abstract

Domestic normative documents, in particular the National Standard of the Russian Federation on Information Protection, outlines three levels of confidence in the results of identification, based on some degree of confidence in the authenticity of the subject of access, but not containing specific values. The article proposes approaches to qualitative assessment of informativeness of user identification parameters by keyboard handwriting on the basis of behavioral biometrics. Objective of the study. Evaluation of informativeness of user identification parameters by keyboard handwriting. Materials and methods of research. To determine approaches to assessing the informativeness of parameters, we studied and analyzed known scientific results and practical solutions on the problem of user identification in information and telecommunication computer systems, available in various open sources in Russian and English. Main results. We identified the currently relevant set of parameters, identifying the user by the keyboard handwriting; the list of noises affecting the informativeness of the parameters. Average values of identification reliability levels were calculated. The basic and additional criteria for evaluating the informativeness of the parameters were defined. False access and false denial rates and overall system evaluation were selected as basic criteria for evaluating reliability of identification by handwriting. As additional criteria the speed of operation, ease of use, the cost of the system are highlighted. For the main criteria the indicators that we propose to use as evaluation characteristics, which could be used to judge the degree of achievement of the criterion: the stability of the parameter in distinguishing users from each other; the number of implementations of the parameter, required to ensure its stability in distinguishing users. The qualitative characteristics of the degree of informativeness of the parameters on the main criteria are given. The directions for further research are defined. Conclusion. The list of parameters and noises presented in the article, the assessment of identification reliability by criteria and corresponding indicators will be useful to developers and researchers for further refinement of identification methods to improve their reliability.