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undergraduate thesis
Implementacija algoritma LZP3 za kompresiju
Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing, 2022. urn:nbn:hr:168:410798
Grgurić Mileusnić, Lovro
University of Zagreb
Faculty of Electrical Engineering and Computing

Institutional repository: FER Repository

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Grgurić Mileusnić, L. (2022). Implementacija algoritma LZP3 za kompresiju (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing. Retrieved from https://urn.nsk.hr/urn:nbn:hr:168:410798

Grgurić Mileusnić, Lovro. "Implementacija algoritma LZP3 za kompresiju." Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2022. https://urn.nsk.hr/urn:nbn:hr:168:410798

Grgurić Mileusnić, Lovro. "Implementacija algoritma LZP3 za kompresiju." Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2022. https://urn.nsk.hr/urn:nbn:hr:168:410798

Grgurić Mileusnić, L. (2022). 'Implementacija algoritma LZP3 za kompresiju', Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, accessed 17 February 2025, https://urn.nsk.hr/urn:nbn:hr:168:410798

Grgurić Mileusnić L. Implementacija algoritma LZP3 za kompresiju [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing; 2022 [cited 2025 February 17] Available at: https://urn.nsk.hr/urn:nbn:hr:168:410798

L. Grgurić Mileusnić, "Implementacija algoritma LZP3 za kompresiju", Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:168:410798

Metadata
TitleImplementacija algoritma LZP3 za kompresiju
Title (english)Implementation of the LZP3 compression algorithm
AuthorLovro Grgurić Mileusnić
MentorStjepan Groš (mentor)
Committee memberStjepan Groš (predsjednik povjerenstva)
Committee memberMihael Marović (član povjerenstva)
Committee memberAdrian Komadina (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Electrical Engineering and Computing
Zagreb
Defense date and country2022-07-04, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Computing
Abstract
Tvrtka Siemens firmware za svoje logičke kontrolere isporučuje komprimiran izmijenjenom varijantom LZP3 algoritma. Opskurnost ove varijante predstavlja prepreku u sigurnosnom istraživanju i analizi jer je firmware nemoguće dekomprimirati standardnim alatima. Stoga istraživačima preostaje samo analiza pristupom crne kutije, za koji je potrebno imati pristup PLC sklopovlju na koje će se firmware učitati. U ovom radu analiziran je općeniti LZP algoritam, njegove četiri izvorne varijante te teorijski model na kojem se algoritam zasniva. Opisana je specifikacija Siemens varijante LZP3 algoritma, odgovarajuća implementacija dekompresora te popratni modul za dekompresiju napisan u programskom jeziku Python.
Abstract (english)
Siemens provides compressed firmware with a modified version of the LZP3 algorithm for its programmable logic controllers. The obscurity of this variant presents an obstacle in security research and analysis because the firmware is impossible to decompress with standard decompression tools. Therefore, researchers can only apply a black box approach to analysis, which requires access to the PLC hardware on which the firmware will be loaded. In this paper, the general LZP algorithm its variants and the underlying theoretical model are analysed. The specification of the Siemens variant of the LZP3 algorithm is described and a Python implementation of the decompressor was developed along with the accompanying decompression module.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:168:410798
Study programmeTitle: Computing
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka računarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka računarstva)
Type of resourceText
File originBorn digital
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Created on2023-01-15 10:14:43