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master's thesis
Povezivanje blockchaina s vanjskim sustavima
2022. urn:nbn:hr:190:287407
Šimunić, Silvio
University of Rijeka
Faculty of Engineering
Department of Computer Engineering
Section of Intelligent Computing Systems

Cite this document

Šimunić, S. (2022). Povezivanje blockchaina s vanjskim sustavima (Master's thesis). Rijeka: University of Rijeka, Faculty of Engineering. Retrieved from https://urn.nsk.hr/urn:nbn:hr:190:287407

Šimunić, Silvio. "Povezivanje blockchaina s vanjskim sustavima." Master's thesis, University of Rijeka, Faculty of Engineering, 2022. https://urn.nsk.hr/urn:nbn:hr:190:287407

Šimunić, Silvio. "Povezivanje blockchaina s vanjskim sustavima." Master's thesis, University of Rijeka, Faculty of Engineering, 2022. https://urn.nsk.hr/urn:nbn:hr:190:287407

Šimunić, S. (2022). 'Povezivanje blockchaina s vanjskim sustavima', Master's thesis, University of Rijeka, Faculty of Engineering, accessed 21 April 2024, https://urn.nsk.hr/urn:nbn:hr:190:287407

Šimunić S. Povezivanje blockchaina s vanjskim sustavima [Master's thesis]. Rijeka: University of Rijeka, Faculty of Engineering; 2022 [cited 2024 April 21] Available at: https://urn.nsk.hr/urn:nbn:hr:190:287407

S. Šimunić, "Povezivanje blockchaina s vanjskim sustavima", Master's thesis, University of Rijeka, Faculty of Engineering, Rijeka, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:190:287407

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Metadata
TitlePovezivanje blockchaina s vanjskim sustavima
Title (english)Connecting blockchain with external systems
AuthorSilvio Šimunić
MentorKristijan Lenac (mentor)
Committee memberMiroslav Joler (predsjednik povjerenstva)
Committee memberRenato Filjar (član povjerenstva)
Committee memberKristijan Lenac (član povjerenstva)
GranterUniversity of Rijeka
Faculty of Engineering
(Department of Computer Engineering)
(Section of Intelligent Computing Systems)
Rijeka
Defense date and country2022-03-28, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Computing
Abstract
Jedno od ograničenja pametnih ugovora je ta da ne mogu pristupati podacima izvan blockchaina koji mogu biti potrebni za izvršavanje neke poslovne logike. Rješenje za ovaj problem je oracle, entitet koji povezuje deterministički blockchain s nedeterminističkim vanjskim sustavima te omogućuje protok podataka između ta dva svijeta. U ovome radu opisan je blockchain oracle, njegove primjene, te su predstavljene i uspoređene neke od postojećih implementacija. Potaknuto ograničenjima postojećih rješenja, razvijen je vlastiti oracle sustav koji omogućava stvaranje tvrdnji o privatnim podacima koji se nalaze izvan blockchaina uz pomoć zero-knowledge dokaza. Praktičnost rješenja prikazana je kroz primjere kao što je dokazivanje godina, kreditne sposobnosti, lokacije i državljanstva.
Abstract (english)
One of the limitations of smart contracts is that they are not able to access the data outside of blockchain which can be required to execute some business logic. Solution to this problem is an oracle, an entity which connects deterministic blockchain with nondeterministic external systems and allows data flow between those two worlds. This thesis describes a blockchain oracle, its applications, and presents and compares some of the existing implementations. Motivated by the limitations of existing solutions, a custom oracle system is developed which allows for making statements on private data that resides outside of blockchain using zero-knowledge proofs. The practicality of the solution is demonstrated through examples such as proving age, credit score, location, and citizenship.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:190:287407
Study programmeTitle: Computer Engineering
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 students and staff of home institution
Terms of useLicence In copyright icon
Created on2022-03-29 11:36:18