Skrivanje informacija u slikama primjenom steganografije

undergraduate thesis

• Title (english): Hiding Data in Images Using Steganography
• Author: Helena Jurela
• Mentor: Tomislav Hrkać (mentor)
• Committee member: Tomislav Hrkać (predsjednik povjerenstva)
• Committee member: Marin Kačan (član povjerenstva)
• Committee member: Mak Gračić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2022-07-05, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing

Abstract

Steganografija je postupak skrivanja podataka u multimedijskim datotekama, najčešće u slikama, tako da ljudska osjetila ne primijete razliku između originalne datoteke i one s umetnutim podacima. Najčešće korištena metoda za umetanje podataka u slike naziva se LSB metoda. To je supstitucijska metoda koja bitove podataka koji se umeću sprema u bitove najmanje važnosti slike u koju se umeće. Mijenjanje samo najmanje važnih bitova slike osigurava da promjene u bojama piksela budu što manje uočljive. U sklopu ovog rada dana je implementacija LSB metode kojom je moguće u sliku sakriti tekst ili drugu sliku te pročitati te skrivene podatke iz slike i rekonstruirati ono što je u nju bilo skriveno.

Abstract (english)

Steganography is a proccess of hiding data in multimedia files, most often images, in a way that human senses do not notice the difference between the original file and the one with the inserted data. The most commonly used method for inserting data into images is called the LSB method. It's a substitution method that stores the bits of inserted data into the least significant bits of the image in which it's inserted. Changing only the least significant image bits ensures that changes in pixel colors are as unnoticeable as possible. In this paper, an implementation of the LSB method is given. Using this implementation it is possible to hide text or another image in an image and to also read the hidden data from an image and reconstruct what was hidden.

• Keywords: steganografija; steganografija u slikama; LSB; bit najmanje važnosti; skrivanje podataka u slikama
• Keywords (english): steganography; image steganography; LSB; least significant bit; hiding data in images
• Language: croatian
• URN:NBN: urn:nbn:hr:168:425345
• Study programme: Title: 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 resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-01-15 10:26:10