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Multi-factor authentication using smart devices to access a cloud service
Huška, Luděk ; Malina, Lukáš (referee) ; Dzurenda, Petr (advisor)
This thesis addresses the issue of current multi-factor authentication methods for modern ICT systems. With increasing demands for security and digitalization, data protection is crucial. The thesis provides an overview of current technologies and solutions in the area of multi-factor authentication and explores their integration into a system for accessing the Nextcloud cloud service using an Android mobile application. The theoretical part deals with authorization, authentication, access control and cryptography basics. The practical part includes the development of an Android application and the implementation of the server part using the ECDSA protocol. The result is a functional login process and an app for Nextcloud that enhances data security and provides users with a more convenient and secure way to log in.
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Advanced Filtering of Digital Evidence
Chudáček, Ondřej ; Dzurenda, Petr (referee) ; Malina, Lukáš (advisor)
This thesis focuses on the implementation of advanced filtering of digital evidence stored on an open source cloud storage NextCloud. The contents of the thesis are law analysis regarding the storage of digital evidence in NextCloud, design of NextCloud, homomorphic encryption and its possible usages, attribute based searchable encryption and its usages and implementation of a simple stand-alone filtration client. Experts on digital evidence were asked about the choice of filtration criteria as a part of the thesis. The key feature of the thesis is a description of implementation of filtration inside NextCloud which has been extended to contain five new filtration criteria. The result has been submitted to performance and functional tests.
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Secure data archiving using cloud computing
Šulič, Martin ; Sikora, Marek (referee) ; Člupek, Vlastimil (advisor)
This master’s thesis is focused on detailed analysis of possibilities of implementing a private cloud and secure data archiving for a long period of time using open-source tools. It describes the individual standards and processes of data preparation, as well as the OAIS reference model for long-term preservation. From the analyzed information, a complete design of the final solution is created, with a description of the functionality and the method of deployment in the environment of Docker containers. The design implementation and the main functionality of individual systems such as Archivematica or Nextcloud are thoroughly described and also the hardware requirements and cryptographic security were evaluated.
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Ensuring Long-term Data Integrity in Cloud Storage
Nohava, Martin ; Člupek, Vlastimil (referee) ; Malina, Lukáš (advisor)
The subject of the thesis is the design and development of a system to ensure the long-term integrity of data from the Nextcloud cloud storage, which manages and stores electronic evidence. In the introductory part, the terms and principles used for securing data integrity are presented, including quantum-resistant digital signature schemes. Subsequently, the architecture of the archiving system and the method of its connection with the Nextcloud cloud storage are proposed. The resulting system consists of two main components, the Archive application, which extends the web interface of the Nextcloud instance, and the archiving system, which ensures the integrity of the archived files themselves. In addition to time stamps, system also uses a quantum-resistant Dilithium signature scheme. At the end of the work, an evaluation of the implemented solution is carried out by measuring the performance of the archiving system, and options for its further development are proposed.
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Advanced Filtering of Digital Evidence
Chudáček, Ondřej ; Dzurenda, Petr (referee) ; Malina, Lukáš (advisor)
This thesis focuses on the implementation of advanced filtering of digital evidence stored on an open source cloud storage NextCloud. The contents of the thesis are law analysis regarding the storage of digital evidence in NextCloud, design of NextCloud, homomorphic encryption and its possible usages, attribute based searchable encryption and its usages and implementation of a simple stand-alone filtration client. Experts on digital evidence were asked about the choice of filtration criteria as a part of the thesis. The key feature of the thesis is a description of implementation of filtration inside NextCloud which has been extended to contain five new filtration criteria. The result has been submitted to performance and functional tests.
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Secure data archiving using cloud computing
Šulič, Martin ; Sikora, Marek (referee) ; Člupek, Vlastimil (advisor)
This master’s thesis is focused on detailed analysis of possibilities of implementing a private cloud and secure data archiving for a long period of time using open-source tools. It describes the individual standards and processes of data preparation, as well as the OAIS reference model for long-term preservation. From the analyzed information, a complete design of the final solution is created, with a description of the functionality and the method of deployment in the environment of Docker containers. The design implementation and the main functionality of individual systems such as Archivematica or Nextcloud are thoroughly described and also the hardware requirements and cryptographic security were evaluated.
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