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Rule-Based Password Generation
Jiránek, Karel ; Matoušek, Petr (referee) ; Hranický, Radek (advisor)
The thesis describes password generation based on rules and parallel generation of passwords on GPU with OpenCL framework. The thesis addresses the design of a password generator for Fitcrack tool. Module for generation of passwords uses machine learning with real passwords to reduce time to find a correct password.
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Association Attack with Hashcat in a Distributed Environment
Wagner, Lukáš ; Veselý, Vladimír (referee) ; Hranický, Radek (advisor)
The Fitcrack project is a distributed system for cracking cryptographic hashes developed at FIT BUT. The Hashcat tool is used to crack passwords on the computational units. This tool added a new attack mode in 2020 called an association attack. This attack is based on knowledge of a likely password, which is extensively modified during the attack. The goal of this work is to design and implement an extension to the Fitcrack project, which enables the use of the association attack and solves its workload distribution in this distributed environment. Association attack requires modification of distribution methods used by other attacks. Such new methods are proposed and implemented. Implementation is later experimentally verified and conclusion is drawn.
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Knowledge of Password Characteristics in Cracking Tasks
Hríbik, Samuel ; Polčák, Libor (referee) ; Hranický, Radek (advisor)
Táto bakalárska práca sa zaoberá metódami, ktorými uživatelia vytvárajú heslá, a tým, aký vplyv môžu mať zásady pre tvorbu hesiel na tieto metódy. Na základe zistených informácií o uživateľských zvyklostiach a často využívaných zásadách navrhuje proces na analýzu a generovanie masiek hesiel s využitím znalostí o vlastnostiach hesiel. Opisuje implementáciu procesu generovania masiek a spôsob, akým je tento proces integrovaný do nástroja na lámanie hesiel Fitcrack ako jeho rozšírenie. Nakoniec obsahuje výsledky experimentov s použitím procesu generovania masiek, ktoré prezentujú funkčnosť tohto rozšírenia v rôznych prípadoch použitia.
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Interactive Tool for Creating Password-Mangling Rules
Mládek, Jiří ; Pluskal, Jan (referee) ; Hranický, Radek (advisor)
The aim of this bachelor thesis was to create an interactive tool for creating password-mangling rules and integrate it into the Fitcrack system. In this thesis, I discuss password-mangling rules which use several available rule functions and can be used to enrich a dictionary attack. The implemented tool also provides a live preview of mangled passwords, allowing the creation of new more efficient dictionaries. The motivation for creating the tool was the current way of creating rules, where existing tools do not offer a graphical user interface and a large selection of rule functions at the same time. The experiments are then used to demonstrate use cases and the benefits of the tool. User testing is also part of the thesis.
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Integration Tests of the Fitcrack System in Selenium
Rucký, Viktor ; Polčák, Libor (referee) ; Hranický, Radek (advisor)
Fitcrack je systém pro distribuované lámání hesel vyvíjený na VUT FIT. Fitcrack je používán hlavně skrz webové rozhraní. Fitcrack je relativně velký projekt, kterému ale chybí sada automatických integračních testů. Selenium je projekt pro automatizované ovládání webových prohlížečů. Tato bakalářská práce má za cíl navrhnout sadu integračních testů, které budou implementované pomocí projektu Selenium. Návrh sady testů je založen na modelu page-object, způsob jak oddělit kód pro interakci s uživatelským rozhraním od testů. Testy jsou implementovány v jazyku Python pomocí frameworku Pytest.
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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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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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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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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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