Implementacija Blockchain novčanika pomoću višestranačke kriptografije praga

master's thesis

• Title (english): Implementation of BlImplementation of Blockchain wallet using multi-party threshold cryptography
• Author: Matija Petrunić
• Mentor: Mirta Baranović (mentor)
• Committee member: Mirta Baranović (predsjednik povjerenstva)
• Committee member: Ljiljana Brkić (član povjerenstva)
• Committee member: Slaven Zakošek (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2022-09-16, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing

Abstract

Blockchain je raspodijeljena glavna knjiga koja strankama omogućuje obavljanje transakcije bez korištenja centralnog autoriteta kao pouzdanog posrednika. Ipak, jedan od izazova korištenja tehnologije je upravljanje privatnim ključevima. Koristeći kriptografske tehnike zvane sigurno višestranačko računanje, moguće je smanjiti rizik upravljanja ključevima. Područje višestranačkog računanja koje se naziva kriptografija praga, olakšava distribuciju privatnog ključa na više stranaka, čime se... More smanjuje rizik od krađe ključeva. U ovom radu obradit će se višestranačko računanje, kriptografija praga i kako se može sigurno implementirati. Nakon toga, obrađuje se Blockchain tehnologija, uspoređuju se prednosti i mane jednostranačkih i višestranačkih sustava novčanika te analiziraju sigurnosni rizici obaju sustava. Finalno, opisana je implementacija kriptografije praga i mrežne podrške potrebne za izradu Blockchain novčanika za generiranje ECDSA potpisa. Less

Abstract (english)

Blockchain is a distributed ledger that allows parties to perform transactions without using a central authority as a trusted intermediary. Still, one of the challenges of using the technology is private key management. By using cryptographic techniques called secure multi-party computation, it is possible to reduce the risk of key management. An area of multi-party computation, called threshold cryptography, facilitates the private key distribution to multiple parties, thus reducing... More the risk of key theft. This paper will explain multi-party computation, threshold cryptography and how it can be securely implemented. After that, it will explain Blockchain technology, compare the advantages and disadvantages of single-party and multi-party wallet systems, and analyse the risks in both systems. Finally, it describes the implementation of threshold cryptography and network support required to create a Blockchain wallet to generate an ECDSA signature. Less

• Keywords: Blockchain; novčanik; višestranačko računanje; kriptografija praga; ECDSA
• Keywords (english): Blockchain; wallet; multi-party computation; threshold cryptography; ECDSA
• Language: croatian
• URN:NBN: urn:nbn:hr:168:423984
• Study programme: Title: Computing; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka računarstva (magistar/magistra inženjer/inženjerka računarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-01-13 15:52:58