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Initial survey on interaction of elderly people with smartphones

Kapczyński Adrian, Lawnik Marcin

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

2020

z. 149

303--313

Purpose: This paper is devoted to elderly people and their interaction with smartphones. The analysis of the state of the art inspired the formulation of research questions related to interaction of elderly people with smartphones, e.g. how do they input data or how do they start the SOS signal. Design/methodology/approach: In order to answer the research questions, an electronic questionnaire was prepared and executed. The survey consisted of 11 questions and was completed by 40 people. Findings: The conducted research has shown that seniors are increasingly using smartphones for a variety of tasks, including (among others) text messaging and multimedia. Originality/value: The presented research is the most current research on the behaviour of seniors using smartphones on the Polish market. The obtained results can be used, among others, when designing applications and devices for seniors.

Application of modified chebyshev polynomials in asymmetric cryptography

Lawnik Marcin, Kapczyński Adrian

Computer Science

2019

Vol. 20 (3)

289--303

Based on Chebyshov polynomials, one can create an asymmetric cryptosystem that allows for secure communication. Such a cryptosystem is based on the fact that these polynomials form a semi-group due to the composition operation. This article presents two new cryptosystems based on modifications of Chebyshev's polynomials. The presented analysis shows that their security is the same as in the case of algorithms associated with the problem of discrete logarithms. The article also shows methods that allow for the faster calculation of Chebyshev polynomials.