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master's thesis
Postupci i metode vizualne kriptografije
2021. urn:nbn:hr:179:116966
Lešina, Petar
University of Split
Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture
Department of Electronics and Computing

Cite this document

Lešina, P. (2021). Postupci i metode vizualne kriptografije (Master's thesis). Split: University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture. Retrieved from https://urn.nsk.hr/urn:nbn:hr:179:116966

Lešina, Petar. "Postupci i metode vizualne kriptografije." Master's thesis, University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, 2021. https://urn.nsk.hr/urn:nbn:hr:179:116966

Lešina, Petar. "Postupci i metode vizualne kriptografije." Master's thesis, University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, 2021. https://urn.nsk.hr/urn:nbn:hr:179:116966

Lešina, P. (2021). 'Postupci i metode vizualne kriptografije', Master's thesis, University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, accessed 19 November 2024, https://urn.nsk.hr/urn:nbn:hr:179:116966

Lešina P. Postupci i metode vizualne kriptografije [Master's thesis]. Split: University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture; 2021 [cited 2024 November 19] Available at: https://urn.nsk.hr/urn:nbn:hr:179:116966

P. Lešina, "Postupci i metode vizualne kriptografije", Master's thesis, University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, 2021. Available at: https://urn.nsk.hr/urn:nbn:hr:179:116966

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Metadata
TitlePostupci i metode vizualne kriptografije
Title (english)Procedures and methods of visual cryptography
AuthorPetar Lešina
MentorMaja Braović (mentor)
GranterUniversity of Split
Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture
(Department of Electronics and Computing)
Split
Defense date and country2021-09-20, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Computing
Abstract
U današnje doba, velika količina informacija prenosi se u digitalnom obliku, što ih čini ranjivim na moguće napade, te je potrebno pronaći načine zaštite tih podataka. Jedna od tehnika je vizualna kriptografija koja koristi digitalne slike za prijenos tajnih poruka. U ovom radu predstavljene su klasične metode vizualne kriptografije – osnovna, proširena i polutonska vizualna kriptografija, vizualna kriptografija za slike u boji i vizualna kriptografija bazirana na nasumičnim okvirima. Kod navedenih metoda, tajna slika se dijeli na generirane udjele koji zasebno gledani ne odaju ništa o tajnoj slici. Ali, međusobnim kombiniranjem udjela može se rekonstruirati skrivena slika. Također, predstavljena je i steganografija, često korištena metoda skrivanja tajnih poruka ili slika korištenjem jednog ili više najmanje značajnih bitova piksela prijenosne slike. U radu su implementirane dvije metode vizualne kriptografije – osnovna i vizualna kriptografija za slike u boji, steganografija za skrivanje slika i tekstualnih poruka, te je pokazan način prikrivanja slika korištenjem generiranog kriptografskog ključa. Opisani su algoritmi implementiranih programa, te su prikazani i ocijenjeni dobiveni rezultati.
Abstract (english)
Nowadays, large amount of information is sent in digital form, which makes them vulnerable to possible attacks, so it is necessary to find ways to protect this data. One technique is visual cryptography that uses digital images to transmit secret messages. This thesis presents the classical methods of visual cryptography - basic, extended and halftone visual cryptography, visual cryptography for color images and visual cryptography based on random frames. In these methods, the secret image is divided into generated shares such that, when viewed separately, they do not reveal anything about the secret image. But, by combining the shares with each other, the hidden image can be reconstructed. Also presented is steganography, a frequently used method of hiding secret messages or images using one or more least significant pixel bits of a portable image. The paper implements visual cryptography two methods - basic and visual cryptography for color images, steganography for hiding images and text messages, and shows how to conceal images using a generated cryptographic key. Algorithms of the implemented programs are described, and the obtained results are presented and evaluated.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:179:116966
Study programmeTitle: Computing
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka računarstva (magistar/magistra inženjer/inženjerka računarstva)
Type of resourceText
File originBorn digital
Access conditionsAccess restricted to authenticated users
Terms of useLicence In copyright icon
Created on2022-07-05 10:28:10