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undergraduate thesis
Pregled i analiza metoda u kriptografiji
Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing, 2015. urn:nbn:hr:168:815498
Svržnjak, Lorena
University of Zagreb
Faculty of Electrical Engineering and Computing

Institutional repository: FER Repository

Cite this document

Svržnjak, L. (2015). Pregled i analiza metoda u kriptografiji (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing. Retrieved from https://urn.nsk.hr/urn:nbn:hr:168:815498

Svržnjak, Lorena. "Pregled i analiza metoda u kriptografiji." Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2015. https://urn.nsk.hr/urn:nbn:hr:168:815498

Svržnjak, Lorena. "Pregled i analiza metoda u kriptografiji." Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, 2015. https://urn.nsk.hr/urn:nbn:hr:168:815498

Svržnjak, L. (2015). 'Pregled i analiza metoda u kriptografiji', Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, accessed 30 November 2024, https://urn.nsk.hr/urn:nbn:hr:168:815498

Svržnjak L. Pregled i analiza metoda u kriptografiji [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing; 2015 [cited 2024 November 30] Available at: https://urn.nsk.hr/urn:nbn:hr:168:815498

L. Svržnjak, "Pregled i analiza metoda u kriptografiji", Undergraduate thesis, University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, 2015. Available at: https://urn.nsk.hr/urn:nbn:hr:168:815498

Metadata
TitlePregled i analiza metoda u kriptografiji
Title (english)Overview and Analysis of Methods in Cryptography
AuthorLorena Svržnjak
MentorLana Horvat Dmitrović (mentor)
Committee memberLana Horvat Dmitrović (predsjednik povjerenstva)
Committee memberMiljenko Mikuc (član povjerenstva)
Committee memberValter Vasić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Electrical Engineering and Computing
Zagreb
Defense date and country2015-07-13, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Computing
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Electrical Engineering
Abstract
Kriptografija je znanost "tajnog pisanja", tj. znanost pohrane informacija tako da one budu čitljive samo onima kome su namijenjene. Koristi se matematikom i matematičkim metodama za šifriranje i dešifriranje podataka. Omogućuje tajno komuniciranje između dvije strane tako da treća strana ne može doći do značenja poruke bez ključa. Kriptografiju dijelimo na klasičnu i modernu. Unutar klasične kriptografije postoje supstitucijske šifre, šifre kod kojih se svako slovo otvorenog teksta zamjenjuje nekim drugim slovom ovisno o ključu, te transpozicijske šifre, šifre kod kojih slova otvorenog teksta mijenjaju položaj čime nastaje anagram. Modernu kriptografiju čine kriptosustavi s tajnim i javnim ključem. Kriptosustavi s tajnim ključem koriste isti ključ za šifriranje i dešifriranje stoga ključ mora biti tajan te se zbog toga takvi kriptosustavi nazivaju simetričnima. Najpoznatiji i najrašireniji takav kriptosustav je DES (engl. Data Encryption Standard). Kriptosustavi s javnim ključem koriste funkciju šifriranja iz koje je vrlo teško dobiti funkciju dešifriranja, pa funkcija šifriranja može biti javna što ukida potrebu razmjene ključeva koja je prisutna kod simetričnih kriptosustava. Još ih nazivamo asimetričnim kriptosustavima, a najpoznatiji takav je RSA kriptosustav. U sklopu rada implementirane su sve obrađene supstitucijske i transpozicijske šifre te RSA kriptosustav.
Abstract (english)
Cryptography is the science of "secret writing", i.e. the science of data storage so that stored data is readable only to those to whom is intended. It uses mathematics and mathematical methods to encrypt and decrypt data. It enables secret communication between two sides so that third party can not understand the message without the key. We divide cryptography into classical and modern. Within classical cryptography there are substitution ciphers, ciphers in which each letter of plain text is replaced by some other letter depending on the key, and transposition ciphers, ciphers in which letters of the plain text change position to form anagram. Modern cryptography consists of cryptosystems with secret and public key. Cryptosystems with secret key use the same key for encryption and decryption, therefore the key must be secret and such cryptosystems are called symmetrical. The best known and most widely used is DES (Data Encryption Standard). Cryptosystems with public key use encryption function of which is very difficult to get the decryption function, therefore encryption function can be public which abolishes the need for key exchange which is present in symmetric cryptosystems. They are also called asymmetric cryptosystems and best known is RSA cryptosystems. All defined substitution and transposition cipher and the RSA cryptosystem are implemented.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:168:815498
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 on2018-02-06 12:09:59