Acta Informatica Pragensia, 2016 (vol. 5), issue 2

PETA: Methodology of Information Systems Security Penetration Testing

Tomáš Klíma

Acta Informatica Pragensia 2016, 5(2), 98-117 | DOI: 10.18267/j.aip.886249  

Current methodologies of information systems penetration testing focuses mainly on a high level and technical description of the testing process. Unfortunately, there is no methodology focused primarily on the management of these tests. It often results in a situation when the tests are badly planned, managed and the vulnerabilities found are unsystematically remediated. The goal of this article is to present new methodology called PETA which is focused mainly on the management of penetration tests. Development of this methodology was based on the comparative analysis of current methodologies. New methodology incorporates current best practices of...

Analysis of Cryptocurrencies Price Development

Jan Lánský

Acta Informatica Pragensia 2016, 5(2), 118-137 | DOI: 10.18267/j.aip.8920047  

Cryptocurrencies are a type of digital currencies based on cryptography principles. Cryptocurrencies are a unique combination of three characteristics: they provide anonymity, they are independent of central authority and they provide protection from double spending attack. The aim of this paper is to capture trends in the area of significant cryptocurrencies price developments and to explain their causes. The current research in this area is exclusively limited to an analysis of the price developments of the most important Bitcoin cryptocurrency; our research is the first to focus on other cryptocurrencies too. The economic perspective on cryptocurrencies...

A DSL-based Approach to Product Derivation for Software Product Line

Nesrine Lahiani, Djamal Bennouar

Acta Informatica Pragensia 2016, 5(2), 138-143 | DOI: 10.18267/j.aip.902750  

Product derivation is an important part of the Software Product Line (SPL) development process. The quality of a product derivation process has a direct impact in decreasing software product costs and time-to-market. In this paper, we present an approach that represents the SPL with a set of integrated models and automatically derives executable products with model transformations. We combine SPL and Model-Driven Engineering (MDE) into a comprehensive and extremely effective framework in order to get advantages of both techniques. In order to evaluate the feasibility of our approach, we have designed and implemented it using existing and available...

Identifikácia QRS komplexu v EKG zázname

Identification of the QRS Complex in the ECG

Martin Paralič

Acta Informatica Pragensia 2016, 5(2), 144-161 | DOI: 10.18267/j.aip.912785  

The cardiovascular heart diseases are one of the most common causes of leading to death of man. Unfortunately, the symptoms vary and the most common reason for critical delays in medical treatment is lack of early warning and patient unawareness. In this paper, we present a development of the mobile application for Electrocardiogram measurements based on communication with a smart clothing using Bluetooth. The objectives of the application are a wireless data collection and analysis of ECG signal. The analysis is aimed for precise detection of QRS complex parameters plus detection of P-wave and T-wave. Measurement and evaluation of multiple PQRST parameters...

Evaluation of Cloud Computing Hidden Benefits by Using Real Options Analysis

Pavel Náplava

Acta Informatica Pragensia 2016, 5(2), 162-179 | DOI: 10.18267/j.aip.923046  

Cloud computing technologies have brought new attributes to the IT world. One of them is a flexibility of IT resources. It enables effectively both to downsize and upsize the capacity of IT resources in real time. Requirements for IT size change defines business strategy and actual market state. IT costs are not stable but dynamic in this case. Standard investment valuation methods (both static and dynamic) are not able to include the flexibility attribute to the evaluation of IT projects. This article describes the application of the Real Options Analysis method for the valuation of the cloud computing flexibility. The method compares costs of the...

Informační rámec kritické infrastruktury

Information Framework of Critical Infrastructure

Stanislava Mildeová, Antonín Dvořák, Pavel Zahradníček

Acta Informatica Pragensia 2016, 5(2), 180-191 | DOI: 10.18267/j.aip.932026  

Information and communication technologies are in connection with security discussed by professional community from many perspectives. The authors perceive information and communication technologies as potential as well as threat to the security environment. The aim of the article is to holistically analyze the basic connection between the information framework and functionality of the critical infrastructure system involved in the activities of the public administration. As a model case is discussed the protection of critical infrastructure against toxic substances. Turbulence of the security environment, conflict transformation into hybrid or asymmetric...

Electronic Payments Profitability Extent Model

Rudolf Vohnout, Zora Říhová, Iva Dostálková

Acta Informatica Pragensia 2016, 5(2), 192-207 | DOI: 10.18267/j.aip.943019  

Cashless payments are recent phenomena, which even increased with the introduction of contactless means like NFC, PayPass or payWave. Such new methods speed-up the entire payment process and in comparison to cash transactions are much simpler and faster. But on the other hand the key question for merchant is if it is worth to have such device, which accept these new payment means or not to have the terminal at all. What is the amount of cash flow, which delimits the cash holdings to be still profitable? This paper tries to give answers to such question by presenting general profitability model, which will address defining the cash threshold amount....

"Vlčkovy semináře" o systémových přístupech na ČVUT v Praze

"Vlček Seminars" About the System Approaches at CTU in Prague

Veronika Vlčková

Acta Informatica Pragensia 2016, 5(2), 208-217 | DOI: 10.18267/j.aip.951603  

In the academic year 2015-2016 at CTU in Prague, Faculty of Transportation Sciences carried out in a more traditional "Vlček seminars", which take place intermittently since 1999. The purpose of the seminars is to look for new, innovative impulses, systems approach to problem solving, organize knowledges and insights on systems engineering tools and objectives and possible areas of their application. The methodological basis is constructive theory of systems, presented by prof. Jaroslav Vlček.