Quick Response code opens possibility to convey data in a unique way yet insufficient prevention and protection might lead into QR code being exploited on behalf of attackers. This thesis starts by presenting a general introduction of background and stating two problems regarding QR code security, which followed by a comprehensive research on both QR code itself and related issues. From the research a solution taking advantages of cloud and cryptography together with an implementation come after. We also give an objective evaluation on the outcome in comparison to existing QR products. They are based on the purpose of enhancing QR code security and aim to interpret how we have tackle the specified problems meanwhile to suggest possible further work for bringing security of QR code to a higher level.

Today, there are many different ways to handle physical access control. RFID cards and tags are still a major solution but during the last years the market have been focusing on taking advantage of the devices that most people always carry with them, such as smartphones, tablets or smartwatches. This thesis has been carried out together with the company BRP Systems. They develop and deliver business systems to mainly the fitness business. In their product suite there is an application for booking workout sessions at these facilities. In this thesis their booking application has been rebuilt as a prototype and the functionality of unlocking the door and checking into workout sessions has been added. The application has been developed in React Native for Android and has been implemented in three versions using different techniques to sensor the users position at the door. The techniques are iBeacon, GPS and QR code. The iBeacon- and GPS versions work by allowing the user to unlock the door when standing outside it. A local notification will be pushed if the application is in the background. The QR code version allows the user to scan a QR code at the door to unlock it. When the door has been unlocked the users can also check into their booked workout sessions. The system and the different versions have been tested at one of BRP Systems customers to evaluate the usability. The conclusion is that an application with high usability can be built with all tested techniques in React Native. For the system to be used several other factors such as security and maintenance has to be considered. The choice to use React Native might be of high risk since it is a relatively new framework relying on community developed libraries.

A utilização de códigos QR por deficientes visuais e robôs expande o horizonte de emprego dessa tecnologia e viabiliza várias aplicações cogitadas por um número crescente de trabalhos acadêmicos. Para que os códigos QR possam ser decodificados eles precisam ser apropriadamente enquadrados. A detecção desses símbolos em imagens adquiridas ao acaso é a primeira etapa na construção de um sistema de enquadramento assistido. O presente trabalho apresenta uma proposta para a detecção de códigos QR em imagens adquiridas ao acaso. A abordagem proposta é baseada em componentes e dividida em estágios, nos quais primeiramente partes do símbolo são detectadas através da técnica de detecção rápida de objetos proposta por Viola-Jones e em seguida uma análise do conjunto formado por essas partes é realizada para determinar a localização exata do símbolo na cena. A adaptação da técnica proposta por Viola e Jones para esse novo domínio é descrita e detalhada. É realizada uma discussão sobre a influência dos muitos parâmetros de treinamento e detecção presentes na abordagem proposta com base em resultados experimentais detalhados. Por fim é apresentado o desempenho em termos da qualidade dos resultados e tempo de processamento em vídeo e conclui-se que a abordagem proposta aponta um caminho promissor na resolução do problema de detecção de códigos QR em imagens adquiridas arbitrariamente na maioria das situações práticas. / The use of QR codes by visually impaired people and robots expands the applications of this technology and enables many possibilities that are emerging in a crescent number of scientific papers. QR code decoding relies on prior framing of the symbol during image acquisition. The detection of these symbols is the first step in the construction of a system to assist the framing process. This work presents an approach for the detection of QR codes in arbitrarily acquired images. The proposed approach is a component-based one consisting of two stages, where parts of the symbol are first detected through the fast object detection method proposed by Viola-Jones, and then an analysis of the set of detected parts is carried subsequently in order to determine the exact location of the symbol in the scene.The adaptation of the framework proposed by Viola-Jones for this new application domain is described in detail. The influence of various training and detection parameters of the framework in QR code detection is discussed using a series of experiments. The performance of the proposed approach is presented in terms of result quality and processing time and it is concluded that the proposed approach indicates a promising direction in solving the problem of detecting QR codes in arbitrarily acquired images in the majority of real world situations.

Tato diplomová práce se zabývá vývojem a implementací algoritmu pro detekci QR kódů s integrací do platformy ROS a výpočty běžícími na grafické kartě. Z rešerše současně dostupných nástrojů a technik je vybrán vhodný postup a algoritmus je napsán jako modul v programovacím jazyce Python, který je snadno integrovatelný do ROS. Ke zprostředkování výpočtů na vícejádrovém hardware, jako jsou grafické karty či vícejádrové procesory, je využita knihovna OpenCL.

This master’s thesis focuses on implementation of ABC (Anonymous attribute-based credential) pilot system on the Android platform. The support for attribute authentication on the Android platform is very weak in terms of the number of implementations and needs a special attention. The theoretical part of the thesis describes the cryptographic support on the Android platform, the use of the Android Native Development Kit (NDK) and the Host-Card Emulation (HCE) service. The theoretical part of the thesis also includes a description of attribute authentication schemes, including a pilot RKVAC system. The practical part describes the implementation of the RKVAC system on the Android platform along with the implementation of a custom cryptographic kernel based on the native MCL cryptographic library. The practical part of this thesis describes implementation proces of RKVAC system on Android plaform, that uses native cryptographic library MCL. The final part shows the results of time, memory and computation difficulty of developed applications.

This master’s thesis deals with coding information and QR codes generating. There is described operation principle of QR codes for this purpose, and design of the equipment. This device is able to encode the information received through the serial port and display it in the QR code on the OLED display. Microprocessor is part of the device, so there is outlined the procedure for programming and testing equipment.

The aim of this diploma thesis was to created application for detection and decoding QR codes using devices with the Android Operating System. For preprocessing of the visual field camera is used OpenCV library. Designed preprocessing string searches a perspective transforms possible QR codes. This is suppressed a shape distortion QR code that would otherwise reduce the successful decoding. At the same time the preprocessing string applied unsharp mask, which reduces the effect of motion blur image caused by the camera motion. Thus preprocessing scene is finally decoded using ZXing library. Described manner it is possible to achieve a higher success rate detection and decoding of QR codes than other conventional QR readers.

The main aim of this diploma thesis is to get acquainted with the area of secure authentication and authorization of users in smartphones on the Android platform. Individual types of encoding, authentications, authentication devices and characteristics of QR codes are decribed in the chapters. In the practical part of this thesis the applications are created with an implemented authentication scheme, which is being developed at FEKT VUT in Brno. The client part of the application, that generates QR code, as well as the server part, that verifies the authenticity of the data, are set up.

På substratenheten på Karolinska Universitetssjukhuset inventerades och produktionsplanerades allt för hand på papper 3 gånger i veckan. Syftet med projektet har varit att hitta en digital lösning för att effektivisera arbetet kopplat till inventeringen och produktionsplaneringen. Målet har därför varit att utveckla en skrivbordsapplikation för att uppnå detta syfte genom avläsning av QR-koder. Projektet genomfördes genom programmering i språket Java och utnyttjade JavaFX för alla grafiska komponenter. Databaskopplingen som krävdes använde mySQL för att sammankoppla program med databas. För utvecklandet av applikationen så har designmönstret Model-View-Controller använts. Vi som författare anser att applikationen bör bearbetas vidare, detta då en del funktionalitet skulle behöva optimeras och även utvecklas vidare för att uppnå önskad användarvänlighet. Dock är vår slutsats att alla de uppsatta målen uppfylldes. / At the substrate unit at Karolinska University Hospital they previously did their inventory and production planning by hand three times a week. The purpose of the project has been to find a digital solution to streamline this unit’s workload connected to inventory and production planning. Therefore, the aim of the project was to develop a desktop application to fulfill the purpose of the project by scanning QR-codes. The project has been performed through programming in the language Java and used the JavaFX library for all graphical components. The database connection used mySQL to connect the program to the database. For the development of the application the design-pattern Model-View-Controller were used. As authors of the report, we consider that the application should be further optimized, and additional functions should be introduced in order to achieve greater usability. However, our conclusion is that the application fulfills the aims set at the beginning of the project.

Despite being safe and effective, human papillomavirus (HPV) vaccination rates are lower than other recommended adolescent vaccines. CDC recommends catch-up vaccination for all persons through age 26 years if not adequately vaccinated when younger making college campuses an important site for catch-up vaccination programs. The project is a quality improvement project being implemented on a public southeastern college campus. The campus health services clinic is the setting for the practice change. Aims: The overall purpose of the QI project is to enhance usage of current CDC HPV recommendations and increase campus population awareness of HPV. Processes: The project received a “Determination of Not Human Subjects Research” from the ETSU Human Research Protection Program. Staff in-service detailing the practice change for routine HPV vaccine status assessment and promotion of HPV vaccination, based on CDC HPV recommendations. Digital-based HPV education materials are being shared with both health services and the student wellness ambassador group. The ambassador group will share items with the campus community via social media and flyers. An optional, anonymous survey will be available when accessing the digital HPV content. De-identified chart audit data will be monitored to assess adoption of the practice change. Nonidentifiable digital access data will be used to assess usage of the educational materials. Results: The final results of the QI project will not be available. Preliminary descriptive statistics will be presented. Limitations: The vaccine isn’t available on campus and the electronic health record lacks directed HPV vaccine assessment on most visit forms. Conclusions: The preliminary conclusions and impact will be presented.