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Password Cracking Using PRINCE Algorithm and Fitcrack System
Bolvanský, Dávid ; Ryšavý, Ondřej (referee) ; Hranický, Radek (advisor)
The PRINCE algorithm is a faster and more advanced version of a combination attack. Non-distributed password breaking often encounters its limits, and its applicability to real tasks decreases due to the increasing demand for computing resources of the device. The aim of this work is to design a distributed version of the the PRINCE attack as an extension of Fitcrack system, which focuses on distributed password cracking. The proposed design is implemented and integrated into the Fitcrack system. The work examines the PRINCE attack on a set of experiments, which examines the impact of various configuration options. Part of the experimental part is a comparison of the PRINCE attack with the dictionary and combination attack. The purpose of the comparison is to find cases where the PRINCE attack is better than other attacks. Finally, the integrated PRINCE attack solution in the Fitcrack system is compared with the solution implemented in the Hashtopolis system.
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Optimization of Task Distribution in Fitcrack System
Ženčák, Tomáš ; Ryšavý, Ondřej (referee) ; Hranický, Radek (advisor)
The goal of this thesis is the optimization of task distribution in the Fitcrack system. The improvement is reached by way of increasing the accuracy of the estimation of the computational power of worker nodes, and the prevention of the creation of extremely small tasks, as well as increasing the efficiency of the transfer of the tasks to the worker nodes. In this thesis, the current state of the Fitcrack system is described, tested, and evaluated. This thesis then describes the weak points of the current implementation, proposes ways of remediating them and describes, tests and evaluates the implementation of those proposals.
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Web Application for Remote Administration of Fitcrack System
Múčka, Matúš ; Veselý, Vladimír (referee) ; Hranický, Radek (advisor)
This thesis aims to solve the design and the implementation of a web application for the remote administration of Fitcrack system. Fitcrack is a system that is used for distributed password recovery. The server part of the web application is designed using REST architecture that reduces server load while simplifying system testing. The presentation layer of the system is implemented as a single-page application. It communicates with the server part using asynchronous requests (AJAX), whose content is in the JSON format. The web application contains a pleasantly responsive user interface, a user system with privileges, and various advanced graphical elements, such as charts.
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Automated Testing of Fitcrack System
Chripko, Juraj ; Polčák, Libor (referee) ; Hranický, Radek (advisor)
This thesis aims to design and implement automated tests for Fitcrack, distributed password cracking system based on BOINC platfrom. White-box testing is used, specifically requirements-based testing. At the begining of the thesis, general testing practices are explained, followed by principles of requirement based testing which is the basis of practical part. Thesis also includes a description of the Fitcrack architecture, the design of tests, selected details of the implementation and chapter about testing itself and tests results.
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Strategies for Distributed Password Cracking
Večeřa, Vojtěch ; Pluskal, Jan (referee) ; Veselý, Vladimír (advisor)
This thesis introduces viable password recovery tools and their categories as well as the technologies and hardware commonly used in this field of informatics. It follows by an overview of the available benchmarking tools for the given hardware. Thesis later contains a description of the custom benchmarking process targeting the aspects of interest. Later, the thesis moves to a distributed system FITcrack as it proposes and experimentally implements new features. The thesis finishes by comparison of the additions against the original state and highlights the areas of improvement.
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Administration of Computing Tasks in Fitcrack System
Horák, Adam ; Zobal, Lukáš (referee) ; Hranický, Radek (advisor)
The aim of this thesis is to design and implement extensions for the Fitcrack system management application. The system is used to crack hashes and recover passwords from encrypted files. It works by distributing computation tasks across multiple computers and includes many configuration options. The extensions outlined in this thesis are meant to aid the user in creating and working with jobs in the system. These include grouping jobs, batch running, and exporting to a file.
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Attack on Encrypted Disk Volumes Using GPU
Sedlo, Ondřej ; Holkovič, Martin (referee) ; Hranický, Radek (advisor)
The aim of this thesis is to create an extension of the Fitcrack tool, which will recover passwords from disk volumes encrypted by TrueCrypt. The introduction part describes the Fitcrack tool which is used for password recovery and supports many different formats of files, and OpenCL framework which is used for computation acceleration. The thesis also deals with the TrueCrypt tool, and its possibilities of use, encrypted disk volumes analysis and cryptographic algorithms used by TrueCrypt to encrypt disk volumes. Furthermore, the work includes a concept and implementation of the Fitcrack module which will be used to recover passwords from disk volumes encrypted by TrueCrypt. At the end of the work we can see results of our experiments that compare speeds of CPU and GPU.
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Attack On OpenDocument Encryption Using GPU
Jakubík, Samuel ; Čejka, Rudolf (referee) ; Hranický, Radek (advisor)
The aim of this work is to extend Fitcrack with a module that allows the recovery of passwords from Open Document Format documents using either CPU or GPU to accelerate the process. The thesis further analyses the structure of the Open Document Format. Subsequently, it describes the functions and algorithms used to encrypt Open Document Format files. The GPU module is implemented with the use of the OpenCL framework. Both the time needed to recover the password and the acceleration of the process using the graphics card were measured. The work also contains a comparison between an existing tool that supports decryption of this format and the newly implemented module.
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Influence of Network Infrastructure on Distributed Password Cracking
Eisner, Michal ; Zobal, Lukáš (referee) ; Hranický, Radek (advisor)
Password cracking is a process used to obtain the cracking key through which we get access to encrypted data. This process normally works on the principle of the repeated try of attempts and their verification by making calculations of cryptographic algorithms. The difficulty of algorithms affects the time spent on solving of the calculations. In spite of various acceleration methods, it is often necessary to distribute the given problem among several nodes which are interconnected via the local network or the internet. The aim of this thesis is to analyze the influence of network infrastructure on the speed, the scalability, and the utilization during different attacks on cryptographical hashes. For these purposes, there was created an automatized experimental environment, which consists of distinctive topologies, scripts, and sets of testing tasks. Based on the results of the analysis, which were obtained by the usage of tools Fitcrack and Hashtopolis it was possible to observe this influence.
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Distributed Password Recovery Using Hashcat Tool
Zobal, Lukáš ; Veselý, Vladimír (referee) ; Hranický, Radek (advisor)
The aim of this thesis is a distributed solution for password recovery, using hashcat tool. The basis of this solution is password recovery tool Fitcrack, developed during my previous work on TARZAN project. The jobs distribution is done using BOINC platform, which is widely used for volunteer computing in a variety of scientific projects. The outcome of this work is a tool, which uses robust and reliable way of job distribution across a local or the Internet network. On the client side, fast and efficient password recovery process takes place, using OpenCL standard for acceleration of the whole process with the use of GPGPU principle.
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