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2 2022

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A new hand-movement-based authentication method using feature importance selection with the hotelling’s statistic

Doroz Rafal, Wrobel Krzysztof, Porwik Piotr, Orczyk Tomasz

Journal of Artificial Intelligence and Soft Computing Research

2022

Vol. 12, No. 1

41--59

The growing amount of collected and processed data means that there is a need to control access to these resources. Very often, this type of control is carried out on the basis of biometric analysis. The article proposes a new user authentication method based on a spatial analysis of the movement of the finger’s position. This movement creates a sequence of data that is registered by a motion recording device. The presented approach combines spatial analysis of the position of all fingers at the time. The proposed method is able to use the specific, often different movements of fingers of each user. The experimental results confirm the effectiveness of the method in biometric applications. In this paper, we also introduce an effective method of feature selection, based on the Hotelling T2 statistic. This approach allows selecting the best distinctive features of each object from a set of all objects in the database. It is possible thanks to the appropriate preparation of the input data.

Nonlinearity of incomplete Boolean functions: prioritizing spectra calculation

Porwik Piotr

Archives of Control Sciences

2022

Vol. 32, No. 4

663--676

In this paper, a class of linear Boolean functions is analyzed. The Boolean function can be represented as disjoint cubes or in the form of a truth vector. The primary purpose of this analysis is to decide whether an incompletely defined function can be extended to a complete linear form. A simple algorithm for generating all states of this function has been proposed if the Boolean function can have a full representation. The algorithm is beneficial for large functions. The proposed approach can be applied to completely and incompletely defined Boolean functions.