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master's thesis
Autentificirana enkripcija
Zagreb: University of Zagreb, Faculty of Science, 2018. urn:nbn:hr:217:653894
Biskup, Lucija
University of Zagreb
Faculty of Science
Department of Mathematics

Institutional repository: Repository of the Faculty of Science

Cite this document

Biskup, L. (2018). Autentificirana enkripcija (Master's thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:653894

Biskup, Lucija. "Autentificirana enkripcija." Master's thesis, University of Zagreb, Faculty of Science, 2018. https://urn.nsk.hr/urn:nbn:hr:217:653894

Biskup, Lucija. "Autentificirana enkripcija." Master's thesis, University of Zagreb, Faculty of Science, 2018. https://urn.nsk.hr/urn:nbn:hr:217:653894

Biskup, L. (2018). 'Autentificirana enkripcija', Master's thesis, University of Zagreb, Faculty of Science, accessed 22 March 2025, https://urn.nsk.hr/urn:nbn:hr:217:653894

Biskup L. Autentificirana enkripcija [Master's thesis]. Zagreb: University of Zagreb, Faculty of Science; 2018 [cited 2025 March 22] Available at: https://urn.nsk.hr/urn:nbn:hr:217:653894

L. Biskup, "Autentificirana enkripcija", Master's thesis, University of Zagreb, Faculty of Science, Zagreb, 2018. Available at: https://urn.nsk.hr/urn:nbn:hr:217:653894

Metadata
TitleAutentificirana enkripcija
AuthorLucija Biskup
MentorFilip Najman (mentor)
Committee memberFilip Najman (predsjednik povjerenstva)
Committee memberRobert Manger (član povjerenstva)
Committee memberAndrej Dujella (član povjerenstva)
Committee memberZrinka Franušić (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Science
(Department of Mathematics)
Zagreb
Defense date and country2018-04-24, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Mathematics
Abstract
Dva najvažnija cilja kriptografije su pružanje povjerljivosti i autentičnosti, odnosno integriteta poruka koje se šalju putem nesigurnog komunikacijskog kanala. Povjerljivost osigurava da je poruka čitljiva samo osobama kojima je namijenjena, dok za ostale treba biti neupotrebljiva. Osiguravanje povjerljivost se postiže metodama enkripcije pomoću kojih se izvorni tekst pretvara u šifrirani tekst, te se takav šalje komunikacijskim kanalom. Integritet podataka je svojstvo koje osigurava da podaci... More nisu izmijenjeni ili krivotvoreni od strane neovlaštenih entiteta. Integritet se najčešće postiže pomoću kodova za autentifikaciju poruka, tzv. MAC-ova. MAC je algoritam za generiranje kratkog niza podataka koji se dodaje na originalnu poruku kako bi se osigurala autentifikacija pošiljatelja i integritet poslane poruke. Mnoge aplikacije koriste algoritme enkripcije i MAC zajedno, svaki algoritam sa svojim ključem, kako bi ostvarile navedene ciljeve. Međutim, ne osigurava svaka kombinacija sigurne enkripcijske sheme i bilo kojeg sigurnog MAC-a tražena svojstva. Pokazalo se da jedino metoda šifriraj-pa-autentificiraj u kojoj se poruka prvo šifrira, a zatim se izračunava MAC za tako šifriranu poruku, osigurava oba svojstva. U novije vrijeme, javlja se ideja za pružanjem povjerljivosti i integriteta podataka koristeći samo jedan algoritam s jednim ključem. Problem korištenja dva algoritma upravo rješava pojava autentificirane enkripcije, koja umjesto dva zasebna algoritma sa dva ključa koristi jedan algoritam s jednim ključem koji objedinjuje funkcije koje pružaju povjerljivost i integritet poruke. Less
Abstract (english)
The two most important goals of cryptography are providing confidentiality, authenticity and integrity of messages that are sent through insecure communication channel. Confidentiality ensures that the message is readable only by the original recipient, while for the others it’s ineligible. Confidentiality is achieved by encryption schemes where the plaintext is converted into ciphertext and in this form it is sent through communication channel. Data integrity is a feature that ensures that... More data is not altered or forged by unauthorized parts of communication. Integrity is usually achieved by message authentication codes, MACs. MAC is an algorithm for generating a short data string which is added to the original message to ensure the authentication of the sender and the integrity of the sent message. Many applications use encryption algorithms and MAC together, each algorithm with its own key, to accomplish these goals. However, not every combination of secure encryption schemes and a secure message authentication code can provide required properties. It can be shown that only the method encrypt-then-authenticate, where the message is first encrypted and then a MAC tag is computed over the encrypted message, provides both properties. More recently, the idea of providing confidentiality and data integrity is emerging using only one single-key algorithm. The problem of using two algorithms is solved with the phenomenon of authenticated encryption, which instead of two separate algorithms uses one single-key algorithm that combines functions that provide both confidentiality and integrity of the message. Less
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:217:653894
Study programmeTitle: Computer Science and Mathematics
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra računarstva i matematike (magistar/magistra računarstva i matematike)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2018-07-10 11:49:40
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