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master's thesis
Šifra Zodiac
Zagreb: University of Zagreb, Faculty of Science, 2025. urn:nbn:hr:217:980083
Blašković, Doris
University of Zagreb
Faculty of Science
Department of Mathematics

Institutional repository: Repository of the Faculty of Science

Cite this document

Blašković, D. (2025). Šifra Zodiac (Master's thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:980083

Blašković, Doris. "Šifra Zodiac." Master's thesis, University of Zagreb, Faculty of Science, 2025. https://urn.nsk.hr/urn:nbn:hr:217:980083

Blašković, Doris. "Šifra Zodiac." Master's thesis, University of Zagreb, Faculty of Science, 2025. https://urn.nsk.hr/urn:nbn:hr:217:980083

Blašković, D. (2025). 'Šifra Zodiac', Master's thesis, University of Zagreb, Faculty of Science, accessed 22 March 2025, https://urn.nsk.hr/urn:nbn:hr:217:980083

Blašković D. Šifra Zodiac [Master's thesis]. Zagreb: University of Zagreb, Faculty of Science; 2025 [cited 2025 March 22] Available at: https://urn.nsk.hr/urn:nbn:hr:217:980083

D. Blašković, "Šifra Zodiac", Master's thesis, University of Zagreb, Faculty of Science, Zagreb, 2025. Available at: https://urn.nsk.hr/urn:nbn:hr:217:980083

Metadata
TitleŠifra Zodiac
Title (english)Zodiac cipher
AuthorDoris Blašković
MentorAndrej Dujella (mentor)
Committee memberAndrej Dujella (predsjednik povjerenstva)
Committee memberHrvoje Planinić (član povjerenstva)
Committee memberBoris Širola (član povjerenstva)
Committee memberMea Bombardelli (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Mathematics)
Zagreb
Defense date and country2025-02-27, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Mathematics
Other Mathematical Disciplines
Abstract
U ovom radu prikazan je sadržaj i povijesni kontekst Zodijakovih šifri, Z408, Z340, Z13 i Z32, te je detaljno opisan postupak dešifriranja istih. Spomenute šifre svojom su složenošću desetljećima zbunjivale stručnjake iz područja kriptografije, forenzike i lingvistike. Iako je živio u doba kada tehnologija nije bila razvijena, Zodijak je uspio kreirati dovoljno složene šifre da ih čak niti moderne tehnologije nisu uspjele dešifrirati. Šifra Z408 šifrirana je kao supstitucijska homofona šifra... More dok je šifra Z340 i homofonska supstitucijska i transpozicijska šifra. Zbog razumijevanja rada na početku je posebna pažnja posvećena definiranju supstitucijske i transpozicijske šifre. Glavni dio rada opisuje ključne faze u dešifriranju spomenutih šifri i korištenu metodologiju, uključujući frekvencijsku analizu, prepoznavanje uzoraka i primjenu računalnih algoritama za automatizaciju procesa. Ovim dijelom daje se uvid u kompleksnost dešifriranja i specifične izazove poput nedosljednosti u šifriranju, mogućih grešaka pri pisanju na koje su nailazili kriptografi kroz više od 50 godina. Less
Abstract (english)
This thesis presents the content and historical context of the Zodiac ciphers, Z408, Z340, Z13, and Z32, and provides a detailed description of the decryption process. These ciphers, with their complexity, have puzzled experts in cryptography, forensics, and linguistics for decades. Despite living in an era where technology was not highly advanced, Zodiac managed to create ciphers complex enough that even modern technologies struggled to decrypt them. The Z408 cipher was encrypted as a... More homophonic substitution cipher, while the Z340 cipher combined both homophonic substitution and transposition methods. To ensure a better understanding of the work, particular attention is given at the beginning to defining substitution and transposition ciphers. The main part of the thesis describes the key phases in decrypting these ciphers and the methodologies used, including frequency analysis, pattern recognition, and the application of computational algorithms to automate the process. This section provides insight into the complexity of the decryption and the specific challenges, such as inconsistencies in encryption and possible writing errors, faced by cryptographers over more than 50 years. Less
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:217:980083
Study programmeTitle: Computer science and mathematics
Study programme type: university
Study level: graduate
Academic / professional title: sveučilišni magistar računarstva i matematike (sveučilišni magistar računarstva i matematike)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2025-02-11 11:55:00
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