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Blockkedjeteknologin på finansiella marknader : Kan blockkedjeteknologin effektivisera handeln med finansiella instrument? / Blockchain technology in the financial markets : Can blockchain technology provide for more efficient trading in securities?Cerneckis, Gvidas January 2018 (has links)
Handeln med finansiella instrument har effektiviserats avsevärt under de senaste decennierna tack vare den tekniska utvecklingen och internationaliseringen. Pappersbaserade värdepapper har ersatts av digitala finansiella instrument och investerare kan numera på ett enkelt sätt skapa värdepappersportföljer innehållande komplexa värdepapper från hela världen. En välfungerande och effektiv handel med finansiella instrument förutsätter att förtroendet existerar mellan aktörer på finansiella marknader. Idag säkerställs förtroendet inom finansiella marknader av ett antal olika finansiella intermediärer, vilka ansvarar för olika funktioner såsom clearing, avveckling och kontoföring. Transaktionskedjan avseende finansiella instrument består därmed av flera nivåer och varje enskild transaktion måste genomgå samtliga nivåer. Den finansiella handeln har ökat betydligt i omfattningen och ett betydande antal transaktioner är numera gränsöverskridande. Detta har resulterat i ett tämligen komplext, sammanlänkat och sårbart system, vilket bland annat har synliggjorts under den senaste finanskrisen år 2008. Blockkedjeteknologi, vilken är en typ av Distributed Ledger Technology, kan något förenklat ses som en databas eller ett transaktionsregister. Till skillnad från traditionella transaktionsregister, vilka i regel är centraliserade och förvaltas av olika intermediärer, bygger den nya teknologin på ett decentraliserat nätverk av aktörer utan att någon tredje part är ansvarig för verifiering av transaktioner. Blockkedjeteknologin introducerar därmed ett nytt sätt att genomföra transaktioner med digitala tillgångar, genom att förtroendet säkerställs med hjälp av kryptografiska lösningar och ett decentraliserat nätverk. Blockkedjeteknologin anses av många ha en betydande potential att effektivisera transaktionskedjan avseende finansiella instrument genom att exempelvis automatisera förandet av transaktionsregister samt integrera de olika nivåerna inom transaktionskedjan. Tekniken är dock fortfarande i en utvecklingsfas och många olika utmaningar återstår innan tekniken kan komma till användning. I Sverige präglas transaktionskedjan avseende finansiella instrument dessutom av strikta regleringar, varför frågan uppstår om huruvida lösningar baserade på blockkedjetekniken är förenliga med dagens rättsliga ramar. I denna uppsats diskuteras huruvida och på vilket sätt blockkedjeteknologin skulle kunna effektivisera vissa funktioner inom transaktionskedjan avseende finansiella instrument samt vilka rättsliga frågeställningar som uppstår i samband med tillämpning av den nya tekniken utifrån dagens rättsläge i Sverige.
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SecuRES: Secure Resource Sharing System : AN INVESTIGATION INTO USE OF PUBLIC LEDGER TECHNOLOGY TO CREATE DECENTRALIZED DIGITAL RESOURCE-SHARING SYSTEMSLeung, Philip, Svensson, Daniel January 2015 (has links)
The project aims at solving the problem of non-repudiation, integrity and confidentiality of data when digitally exchanging sensitive resources between parties that need to be able to trust each other without the need for a trusted third party. This is done in the framework of answering to what extent digital resources can be shared securely in a decentralized public ledger-based system compared to trust-based alternatives. A background of existing resource sharing solutions is explored which shows an abundance third party trust-based systems, but also an interest in public ledger solutions in the form of the Storj network which uses such technology, but focuses on storage rather than sharing. The proposed solution, called SecuRES, is a communication protocol based on public ledger technology which acts similar to Bitcoin. A prototype based on the protocol has been implemented which proves the ability to share encrypted files with one or several recipients through a decentralized public ledger-based network. It was concluded that the SecuRES solution could do away with the requirement of trust in third parties for all but some optional operations using external authentication services. This is done while still maintaining data integrity of a similar or greater degree to trust-based solutions and offers the additional benefits of non-repudiation, high confidentiality and high transparency from the ability to make source code and protocol documentation openly available without endangering the system. Further research is needed to investigate whether the system can scale up for widespread adoption while maintaining security and reasonable performance requirements. / Projektet ämnar lösa problemen med oförnekbarhet, integritet och konfidentialitet när man delar känsligt data mellan parter som behöver lita på varandra utan inblanding av betrodd tredje part. Detta diskuteras för att besvara till vilken omfattning digitala resurser kan delas säkert i ett decentraliserat system baserat på publika liggare jämfört med existerande tillitsbaserade alternativ. En undersökning av nuvarande resursdelningslösningar visar att det existerar många tillitsbaserade system men även en växande andel lösningar baserade på publika liggare. En intressant lösning som lyfts fram är Storj som använder sådan teknologi men fokuserar på resurslagring mer är delning. Projektets föreslagna lösning, kallad SecuRES, är ett kommunikationsprotokoll baserat på en publik liggare likt Bitcoin. En prototyp baserad på protokollet har tagits fram som visar att det är möjligt att dela krypterade filer med en eller flera mottagare genom ett decentraliserat nätverk baserat på publika liggare. Slutsatsen som dras är att SecuRES klarar sig utan betrodda tredje parter för att dela resurser medan vissa operationer kan göras mer användarvänliga genom externa autentiseringstjänster. Själva lösningen garanterar integritet av data och medför ytterligare fördelar såsom oförnekbarhet, konfidentialitet och hög transparens då man kan göra källkoden och protocoldokumentation fritt läsbar utan att utsätta systemet för fara. Vidare forskning behövs för att undersöka om systemet kan skalas upp för allmän användning och alltjämt bibehålla säkerhets- samt prestandakrav.
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Secure Bitcoin WalletGuler, Sevil January 2015 (has links)
Virtual currencies and mobile banking are technology advancements that are receiving increased attention in the global community because of their accessibility, convenience and speed. However, this popularity comes with growing security concerns, like increasing frequency of identity theft, leading to bigger problems which put user anonymity at risk. One possible solution for these problems is using cryptography to enhance security of Bitcoin or other decentralised digital currency systems and to decrease frequency of attacks on either communication channels or system storage. This report outlines various methods and solutions targeting these issues and aims to understand their effectiveness. It also describes Secure Bitcoin Wallet, standard Bitcoin transactions client, enhanced with various security features and services.
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Modelling and Analysis of Swedish Heavy Industry Supply Chain Data Management to Improve Efficiency and Security / Modellering och analys för att förbättra effektivitet och säkerhet inom Svenska tungindustrins leveranskedjaKarlsson, Daniel January 2021 (has links)
Product certificates are sent throughout the supply chain of Swedish heavy industry in order to show provenance and physical characteristics of objects such as screws. The data management of the certificates has been, and still is, a very manual process. The process requires extensive work in order to maintain a correct record of the certificates. In particular, tracing causes of errors and establishing compliance takes a long time and effort. The company Chaintraced is developing an application to automate the process by acting as a third party to digitalize and manage the certificates. Introducing a third party into a business-to-business process requires that data integrity is preserved and that information reaches its expected destination. Recent research has indicated that distributed ledger technologies showpromise to fulfill these requirements. In particular, blockchain-based systems offer immutability and traceability of data, and can reduce the trust needed between different parties by relying on cryptographic primitives and consensus mechanisms. This thesis investigates the application of distributed ledger technology to further automate the Swedish heavy industry supply chain and reduce the trust needed in a third party managing the certificates. Requirements for an industrial strength system is set up and several distributed ledger technology solutions are considered to fit the use case of Swedish heavy industry. A proof of concept based on the findings is implemented, tested and compared with a centralized database to explore its possible usage in the supply chain with regard to feasibility, immutability, traceability and security. The investigation resulted in a prototype based on Hyperledger Fabric to store product certificates. The solution provides certain guarantees to immutability and security while being developed with feasibility for deployment in mind. The proposed solution is shown to be slow compared to a centralized solution but scales linearly with number of certificates and is considered within bounds for the use case. The results also show that the proposed solution is more trustworthy than a centralized solution, but that adopting blockchain technology is an extensive task. In particular, trustworthiness and guarantees provided by the solution is highly dependent on the feasibility aspect and the investigation concludes that adoption of blockchain technology within the Swedish heavy industry must take this into consideration. / Hanteringen av produktcertifikat inom den svenska tungindustrin är en mycket manuell process vilket resulterar i att ett enormt arbete krävs för att upprätthålla en korrekt hantering av certifikaten. Att spåra orsaken till fel och att kontrollera efterlevnaden av krav inom industrin tar lång tid. Chaintraced har utvecklat en applikation som automatiserar hanteringen av certifikaten genom digitalisering och att som tredje part lagra informationen. Att introducera en tredje part i affärsverksamheter kräver att integriteten av datan bibehålls och att information anländer till korrekt mottagare. Ny forskning har visat att distribuerade liggare har möjligheten att uppfylla dessa krav. Framförallt gällande blockkedjetekniken med dess många egenskaper och garantier som företag letar efter, så som oföränderlig och spårbar data. Blockkedjetekniken reducerar också förtroendet som behövs för parter inom nätverket genom att förlita sig på kryptografi och konsensus mekanismer. Den här rapporten utreder användningen av distribuerade liggare för att ytterliggare automatisera den svenska tungindustrins leveranskedja och minska tilliten som krävs för en tredje part som hanterar certifikaten. Krav ställs upp för ett system och flertalet distribuerade databastekniker undersöks för att passa in i fallet angående den svenska tungindustrin. En prototyp är utvecklad baserad på kraven, prototypen är testad och jämförd med en central databas för att undersöka hur implementationen står sig vad gäller genomförbarhet, oföränderlighet, spårbarhet och säkerhet. Undersökningen resulterade i en prototyp baserad på Hyperledger Fabric. Prototypen lagrar produktcertifikaten och ger vissa garantier till oföränderligbarhet samt säkerhet. Möjligheten för aktörer i kedjan att använda prototypen hade stor inverkan på hur systemet utvecklades. Prototypen visar sig vara långsammare än en centraliserad lösning men mätningarna kan anses vara inom kraven för ett system inom tungindustrins leveranskedja. Skalbarheten av lösningen är beroende av kraven på säkerhet men är linjär i antalet certifikat som skickas och lagras. Resultaten visar också att den föreslagna lösningen inger mer tillit än en centraliserad lösning men att introducera blockkedjetekniken är en komplex process. Trovärdighet och garantier som ges av lösningen är till stor del beroende av komplexiteten vilket rapporten kommer fram till är det viktigaste för svensk tungindustri att ha i åtanke vid eventuell antagande av blockkedjeteknik.
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Perceived Affordance and Socio-Technical Transition: Blockchain for the Swedish Public Sector / Uppfattad görlighet och socio-teknisk övergång: blockkedjor för svensk offentlig sektorJONSSON, JOHAN R. January 2018 (has links)
The Swedish public sector is under constant pressure to improve processes and services through further digitalization. Blockchain is a novelty technology which shows promise of enabling functionalities which are desired within the sector. However, as the technology is still in its infancy, the practical value it could offer the sector remains unproven. In this master thesis, the socio-technical transition of the public sector for adopting blockchain is analyzed using the multi-level perspective framework. The sector is operationalized as an incumbent socio-technical regime and blockchain as a collection of niche innovations. Affordance theory and the multi-level perspective are combined to analyze how the perception of blockchain affects the potential transition pathways. The primary empirical data is gathered through a series of interviews with key individuals from both the Swedish public sector and blockchain community, as well as from attending blockchain events. Secondary data is gathered through the review of various types of literature regarding the topic. The findings of the thesis show that the practical value and functionalities that blockchain offers and that match the needs of the sector are verification, authentication, traceability, automating simple logical functions, and digitizing unique value. The identified conceptual solutions deemed suitable today are: blockchain for identity management, blockchain for data verification, blockchains for property registers of, e.g., vehicles and real estate, and external industry blockchains for improved traceability of, e.g., supply chains and sales records. The thesis also derives recommendations for the public sector indicating that, e.g., active education, revision of regulation, and international cooperation would further a potential transition towards blockchain. It also finds that perceived affordances of a technology in its early stages affect the transition pathways; barriers of entry, number of potential adopting application sectors, the level of coordination, and the available resources for development are influenced by the perceptions. / Svensk offentlig sektor utsätts konstant för påtryckningar gällande fortsatt digitalisering av processer och tjänster. Blockkedjan är en ny teknologi som påvisar potential att kunna tillgodose funktioner önskvärda inom den offentliga sektorn. Dock är teknologin fortfarande i ett begynnande stadie och dess praktiska värde är ännu obevisat. I detta examensarbete analyseras offentliga sektorns potentiella socio-tekniska övergång till att ta blockkedjor i bruk med hjälp av multinivåperspektiv-ramverket. Sektorn operationaliseras som en befintlig socio-teknisk regim och blockkedjor som en samling av nischinnovationer. Görlighetsteori och multinivåperspektivet kombineras för att analysera hur uppfattningen av blockkedjor påverkar de potentiella övergångsvägarna. Primära empiriska data samlas in genom en serie av intervjuer med nyckelindivider från både svensk offentlig sektor och blockkedjegemenskapen, samt även från deltagande i blockkedjearrangemang. Sekundära data samlas in genom en studie av diverse typer av litteratur gällande ämnet. Examensarbetets resultat påvisar att det praktiska värdet och funktionaliteterna som blockkedjor tillgodoser och som passar med offentliga sektorns behov är verifikation, autentisering, spårbarhet, automatisering av simpla logiska funktioner, samt digitalisering av unika värden. De identifierade konceptuella lösningarna som bedöms lämpliga i dagsläget är: blockkedja för identitetshantering, blockkedja för dataverifikation, blockkedjor för egendomsregister, t.ex. för fordon och bostäder, samt externa industriblockkedjor för förbättrad spårning, t.ex. av försörjningskedjor och försäljning. Examensarbetet härleder även rekommendationer till offentliga sektorn, innefattande exempelvis aktiv utbildning, revision av reglementen, samt internationellt samarbete. Resultaten påvisar även att den uppfattade görligheten av en teknologi i ett tidigt stadie av innovation påverkar övergångsvägarna in i en regim. Detta genom att uppfattningarna influerar inträdesbarriärer, antalet potentiella applikationssektorer, koordinationsnivån, samt mängden tillgängliga resurser.
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A phenomenological study of an emerging financial value ecosystem: based on distributed ledger technology and novel peer to eer game structure / Ucwaningo olugxile ezigamekweni okuhlangatshezwane nazo maqondana neekhosistimu efufusayo yobunani-mali: olusekelwe phezu kwe-distributed ledger technology Kanye ne-novel peer-to-peer game structureCrafford, Francois 02 1900 (has links)
Abstracts in English, Zulu and Xhosa / The central research issue in this study is the third morphing of economies due to the externally available intelligent building blocks of technology. More specifically, it is anticipated that the widespread use of distributed ledger technology will transform the workings of organisations to such a degree that they will cease to exist in their current form. Hence, the use of distributed ledger technology is not merely a tame management problem; it poses a wicked strategic problem.
Furthermore, natural explanations add to the confusion in relation to what managers should do with distributed ledger technology. A transcendental phenomenological attitude is required to transcend the multitude of natural explanations. Phenomenology is both the philosophy and method employed in this study, which questions what human engagement in the world is about. More specifically in this study engagement with distributed ledger technology. This study closes this gap in knowledge by giving an accurate description of the essence of the distributed value ecosystem phenomenon.
The study makes a contribution to more coherent and fundamental understanding the essences of the distributed value ecosystem phenomenon is the nature of the relationship patterns that participants hold to distributed ledger technology.
The central factual finding is the nature and pattern of these relationships is transactional and circular.
The pattern preferred by most organisations is the bounded binary transactional pattern. Organisations seek primarily to have power over the socially complex aspects in transacting. However, the bounded binary transactional pattern may become an unbalanced and unfair value-subtract relationship over time. The response to unbalanced binary bounded value relationships is the unbounded transactional pattern, which gives participants greater autonomy and privacy pseudonymity, but not the transparency that is essential to transact seamlessly.
The third value relationship pattern and novel idea presented is the folded value relationship pattern in which participants balance conflicts over socially complex aspects in relation to self and others by meeting narrow micro-level near interaction conditions. This is a more folded, novel strategic game that participants can pick. The key implication for society and organisations is that it presents an alternative approach to dealing with conflict in socially complex value relationships. In essence, with the folded transactional pattern, participants seek to trade up value relationships in relation to self and with others, as opposed to making value relationship trade-offs or sacrifices that lead to either compromises in relation to self or dominance over others. However, the practical managerial implication is truly folded value relationship pattern is not easy to create and is rare. / Umbandela ophambili wophando kwesi sifundo kukuzotywa ngokutsha kwesithathu kwezoqoqosho
ngenxa yobukho bezakhi zobuchwepheshe ezinobukrelekrele. Eyona nto ingundoqo yeyokuba
kucingelwa ukuba ukusetyenziswa kakhulu kobuchwepheshe bokubhala iingxelo mali buya
kuyiguqula indlela asebenza ngayo amaqumrhu, ade ayeke ukusebenza ngale ndlela enza ngayo
ngoku. Ukusetyenziswa kobuchwepheshe bokusasaza iingxelo zogcino mali (ngesiNgesi
kusetyenziswa isishunqulelo esithi DLT) akuyongxakana nje yolawulo; kuyingxaki enkulu
nekhohlakeleyo.
Ngaphaya koko, iinkcazelo ezikhoyo zongeza ukubhideka malunga neyona nto emele ukwenziwa
ngabaphathi ngobu buchwepheshe bokusasaza iingxelo zogcino mali. Into efunekayo kukusebenzisa
indlela yophando ngokuphicotha amava nokufuna ukuqonda indlela acinga ngayo umntu, ngakumbi
kumba omalunga nobuchwepheshe bokusasaza iingxelo zogcino mali. Esi sifundo sivala isikhewu
solwazi esikhoyo ngokunika inkcazelo echanekileyo ngalo mbandela wokusasazwa kokuxabiseka
kwentsebenziswano yendalo nomntu.
Esi sifundo sinceda ekuqondeni iziseko zombandela wokusasazwa kokuxabiseka kwentsebenziswano
yendalo nomntu neepatheni zolwalamano lwabathathi nxaxheba kwicandelo lobuchwepheshe
bokusasaza iingxelo zogcino mali.
Eyona nto ingundoqo efumanisekayo kukuba ubume nepatheni yolu lwalamano iquka
intsebenziswano yorhwebo kwaye ifana nomjikelo.
Ipatheni ekhethwa ngamaqumrhu amaninzi yileyo yentsebenziswano ephakathi kwesibini.
Amaqumrhu afuna tanci ukuba nolawulo kwimiba enzima yezentlalo xa erhwebelana. Noxa kunjalo,
ipatheni yokurhwebelana ngezibini isenokudala ukungalingani nokuqhathana ngokuhamba
kwexesha. Usabelo kulwalamano lwezibini olungenalingano yiphatheni yorhwebelwano
olungabekelwanga mida, apho abathathi nxaxheba bekwazi ukuzithathela izigqibo ekhusini
bengazichazi ukuba bangoobani, nto leyo inqanda ukusebenza ekuhleni nokufunekayo
ekusebenzisaneni ngaphandle kwamagingxigingxi.
Ipatheni yesithathu kwixabiso lolwalamano kulapho ulwalamano lusongiwe, apho abathathi
nxaxheba belungelelanisa iingxabano ezingemiba yezentlalo enzima ngokufezekisa iimeko ezilula
nezincinane. Oku kufana nomdlalo osongeneyo nolicebo lobulumko onokukhethwa ngabathathi
nxaxheba. Okubalulekileyo kukuba le yindlela eyenye enokukhawulelana neengxwabangxwaba
eluntwini nakumaqumrhu. Eneneni, kwipatheni yentsebenziswano esongeneyo, abathathi nxaxheba
bazama ukutshintsha ulwalamano oluphakathi komntu nabanye, endaweni yokuncama izinto ezithile
ezinokukhokelela kwilahleko okanye ekonganyelweni ngabanye. Noxa kunjalo, ipatheni
yolwalamano olusongeneyo kulwalamano lwabalawuli ayinto ilula kwaye inqabile. / Udaba olungumgogodla walolu cwaningo wukuguquka kwesithathu kweminotho ngenxa yamandla
namakhono obuchwepheshe besimanjemane atholakala ngaphandle kwenhlangano.
Ngokuqondileyo, kubhekeke ukuthi ukusetshenziswa kakhulu kwe-distributed ledger technology
kusiguqule kakhulu isimo-sakhiwo sezinhlangano kanye nendlela ezisebenza ngayo, kangangukuthi
zigcine sezingabonakali neze ukuthi zike zaba kulesi simo-sakhiwo ezikusona njengamanje. Ngakhoke
ukusetshenziswa kwe-distributed ledger technology akuyona neze inkinga elula futhi
abangayixazulula kalula abaphathi; kepha kuyinkinga eyinkimbinkimbi futhi eyimpicabadala
okungelula nakancane ukuyixazulula.
Ngaphezu kwalokho, izincazelo zemvelo ziyengeza phezu kokudideka okuphathelene nalokho
okumele kwenziwe ngabaphathi maqondana ne-distributed ledger technology. Ukuze kudlulelwe
ngale kwenqwabanqwaba yezincazelo zemvelo ezikhona kudingeka indlela-kucabanga nendlelakubuka
evulekile yokuqonda ulwazi oluphathelene nezimo kanye nezigameko okuhlangatshezwane
nazo noma okudlulwe kuzona. Ifenomeloji iyikho kokubili ifilosofi kanye nendlela-kusebenza
esetshenzisiwe kulolu cwaningo, okuphonsa umbuzo mayelana nokuthi kuphathelene nani
ukuxhumana kanye nokubandakanywa kwabantu emhlabeni, ikakhulukazi maqondana
nokubandakanywa okuphathelene ne-distributed ledger technology. Lolu cwaningo luvala igebe
lokungabi khona kolwazi ngokuthi lunikeze incazelo enembayo yomongo we-distributed value
ecosystem.
Ucwaningo luyalekelela futhi lufake isandla ekutholakaleni kokuqonda okuhle nokuhleleke kahle
futhi okuyisisekelo komongo we-distributed value ecosystem okungukuthi lokhu kuwuhlobo
lwamaphethini obudlelwano obuboniswa ngababambiqhaza maqondana ne-distributed ledger
technology.
Umphumela osemqoka kakhulu futhi oyiqiniso otholakale ocwaningweni wukuthi ubunjalo kanye
nephethini yalobu budlelwano ibandakanya izinhloso zokuzizuzela okuthile futhi okungubudlelwano
obusasiyingi.
Iphethini encanyelwa yiningi lezinhlangano yi-bounded binary transactional pattern. Izinhlangano
zihlose ikakhulukazi ukuba namandla phezu kwezinto ezithile ezinobunkimbinkimbi emphakathini
lapho zenza umsebenzi wazo. Kodwa-ke ngokuhamba kwesikhathi i-bounded binary transactional
pattern kungenzeka ibonise ubudlelwano obungenakho ukulingana futhi obuchemile
obungenabugugu. Impendulo yokubhekana nobudlelwano obungama-unbalanced binary bounded
value relationships yi-unbounded transactional pattern, enikeza ababambiqhaza ukukhululeka
nokuzimela okukhudlwana kanye nobumfihlo bokuthi bangazidaluli noma baziveze ukuthi
bangobani, kodwa-ke lokhu akubanikezi ukusebenza ngendlela esobala okuyinto edingekayo
ekusebenzeni ngaphandle kwezihibe.
I-third value relationship pattern kanye nomqondo ophusile owethulwayo yi-folded value
relationship pattern lapho ababambiqhaza beqinisekisa ukuthi kunokulingana phakathi
kokungqubuzana noma udweshu oluphathelene nezinto eziyinkimbinkimbi emphakathini
maqondana nabo uqobo kanye nabanye abantu, ngokuthi bahlangabezane nama-narrow micro-level near-interaction conditions. Lokhu kuwumdladlwana ofongqekile wesimanjemanje futhi okhethekile nosemqoka ongasetshenziswa ngababambiqhaza. Umthelela osemqoka walokhu emphakathini nasezinhlanganweni wukuthi lokhu kuhlinzeka ngendlela ehlukile yokubhekana nokungqubuzana nodweshu kubudlelwano obuyinkimbinkimbi emphakathini. Empeleni, ku-folded transactional pattern, ababambiqhaza bahlose ukuthola okungcono kubudlelwano phakathi kwabo bona uqobo lwabo kanye nabanye abantu esikhundleni sokwakha ubudlelwano lapho izinhlangothi zonke zithola ukushintshisana okulinganayo noma ukuzidela okuthile maqondana nobudlelwano, okuyinto eholela ekutheni kube nokuvumelana phakathi kwezinhlangothi okuhambisana nokuzidela komuntu uqobo lwakhe noma-ke ukukhonya phezu kwabanye. Kodwa-ke umthelela walokho oqondene nabaphathi wukuthi akulula neze ukwakha i-folded value relationship pattern yoqobo futhi lokhu kuyivela kancane. / Business Management / D. Com. (Business Management)
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Vnitropodnikové směrnice ve společnosti Focus Cz Marketing and IT Research s.r.o. / Internal Guidelines in the Focus Cz Marketing and IT Research s.r.o.Bartošíková, Tereza January 2014 (has links)
This thesis deals with issues related to internal guidelines of the particular company. Initially defines the internal guidelines and related basic concepts and then analyzes guidelines of the company and proposes implementation of new company regulations or improvement of the existing ones in order to help the company to statutory and effective accounting
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Locating the Unlocated : An Examination of Choice of Law and Consumer Protection in Cryptocurrency TradingFernandez Gomero, Laura January 2023 (has links)
Disputes involving emerging technology, often leave a grey area on applicable law, as it is unlocated in the physical world. The problem with crypto-assets is partly driven by their underlying technology, allowing for the assets to be distributed in an international, digital sphere, and making it hard to pinpoint their territorial location and solve legal issues. This thesis, therefore, aims to clarify the questions of qualification and connecting factors for the choice of law when dealing with disputes concerning crypto-assets under a cross-border contractual agreement. It particularly seeks to examine consumer protection and the predictability of the choice of law in cryptocurrency trading. The thesis concludes that, for some specifically listed contracts, the applicable law is determined through hard and fast rules, but for other more complex contracts, the applicable law is determined by primarily examining the habitual residence of the operator of the characteristic performance, and secondarily, the closest connection. As to consumer contracts, a special rule appoints the law of the country where the consumer has his habitual residence, but only when several requirements are met. The rules pose problems with predictability and finding a territorial connection when the location of the assets or parties cannot be located. It is particularly a problem in decentralized cryptocurrency exchanges. Regarding the qualification, the thesis concludes that the current rules and statements do not provide a definite answer to the characterization of crypto-assets and require technically complex interpretations. Crypto-assets are mainly categorized based on their purpose, and the parties’ expectations. Therefore, fictional objectification of cryptocurrencies as movable property is possible when accepted as such by the parties. Moreover, cryptocurrency trading does not fall within traditional financial regulations but can be categorized as a service where the coins constitute a means of payment. Although the views are divided, causing uncertainty in the market, the obligations of traders are expected to be clarified through upcoming regulations.
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Transaction synchronization and privacy aspect in blockchain decentralized applicationsOngkasuwan, Patarawan January 2020 (has links)
The ideas and techniques of cryptography and decentralized storage have seen tremendous growth in many industries, as they have been adopted to improve activities in the organization. That called Blockchain technology, it provides an effective transparency solution. Generally, Blockchain has been used for digital currency or cryptocurrency since its inception. One of the best-known Blockchain protocols is Ethereum, which has invented the smart contract to enable Blockchain’s ability to execute a condition, rather than simply acting as storage. Applications that adopt this technology are called ‘Dapps’ or ‘decentralized applications’. However, there are ongoing arguments about synchronization associated with the system. System synchronization is currently extremely important for applications, because the waiting time for a transaction to be verified can cause dissatisfaction in the user experience. Several studies have revealed that privacy leakage occurs, even though the Blockchain provides a degree of security, as a result of the traditional transaction, which requires approval through an intermediate institution. For instance, a bank needs to process transactions via many constitution parties before receiving the final confirmation, which requires the user to wait for a considerable amount of time. This thesis describes the challenge of transaction synchronization between the user and smart contract, as well as the matter of a privacy strategy for the system and compliance. To approach these two challenges, the first task separates different events and evaluates the results compared to an alternative solution. This is done by testing the smart contract to find the best gas price result, which varies over time. In the Ethereum protocol, gas price is one of the best ways to decrease the transaction time to meet user expectations. The gas price is affected by the code structure and the network. In the smart contract, testing is run based on two cases, and solves platform issues such as runners and user experience and reduces costs. It has also been found that collecting the fee before participating in an auction can prevent the problem of runners. The second case aims to prove that freezing the amount of a bid is the best way to increase the user’s experience, and to achieve the better experience of an online auction. The second challenge mainly focuses on the privacy strategy and risk management for the platform, which involves identifying possible solutions for all risk situations, as well as detecting, forecasting and preventing them. Providing strategies, such as securing the smart contract structure, increasing the encryption method in the database, designing a term sheet and agreement, and authorization, help to prevent system vulnerabilities. Therefore, this research aims to improve and investigate an online auction platform by using a Blockchain smart contract to provide evocative user experiences. / Idéer och tekniker för kryptografi och decentraliserad lagring har haft en enorm tillväxt i många branscher, eftersom de har antagits för att förbättra verksamheten i organisationen. Den som kallas Blockchain-tekniken ger den en effektiv transparenslösning. Generellt har Blockchain använts för digital valuta eller cryptocurrency sedan starten. Ett av de mest kända Blockchainprotokollen är Ethereum, som har uppfunnit det smarta kontraktet för att möjliggöra Blockchains förmåga att utföra ett villkor, snarare än att bara fungera som lagring. Applikationer som använder denna teknik kallas 'Dapps' eller 'decentraliserade applikationer'. Det finns emellertid pågående argument om synkronisering associerad med systemet. Systemsynkronisering är för närvarande oerhört viktigt för applikationer, eftersom väntetiden för att en transaktion ska verifieras kan orsaka missnöje i användarupplevelsen. Flera studier har visat att sekretessläckage inträffar, även om Blockchain ger en viss säkerhet, till följd av den traditionella transaktionen, som kräver godkännande genom en mellaninstitution. Till exempel måste en bank bearbeta transaktioner via många konstitutionspartier innan den får den slutliga bekräftelsen, vilket kräver att användaren väntar en betydande tid. Den här avhandlingen beskriver utmaningen med transaktionssynkronisering mellan användaren och smart kontrakt, samt frågan om en sekretessstrategi för systemet och efterlevnad. För att närma sig dessa två utmaningar separerar den första uppgiften olika händelser och utvärderar resultaten jämfört med en alternativ lösning. Detta görs genom att testa det smarta kontraktet för att hitta det bästa gasprisresultatet, som varierar över tiden. I Ethereum-protokollet är gaspriset ett av de bästa sätten att minska transaktionstiden för att möta användarens förväntningar. Gaspriset påverkas av kodstrukturen och nätverket. I det smarta kontraktet körs test baserat på två fall och löser plattformsproblem som löpare och användarupplevelse och minskar kostnaderna. Det har också visat sig att insamlingen av avgiften innan du deltar i en auktion kan förhindra löparproblemet. Det andra fallet syftar till att bevisa att frysning av budbeloppet är det bästa sättet att öka användarens upplevelse och att uppnå en bättre upplevelse av en online auktion. Den andra utmaningen fokuserar huvudsakligen på sekretessstrategin och riskhanteringen för plattformen, som innebär att identifiera möjliga lösningar för alla risksituationer, samt att upptäcka, förutse och förhindra dem. Tillhandahållande av strategier, som att säkra den smarta kontraktsstrukturen, öka krypteringsmetoden i databasen, utforma ett termblad och avtal och godkännande, hjälper till att förhindra systemets sårbarheter. Därför syftar denna forskning till att förbättra och undersöka en online-auktionsplattform genom att använda ett smart avtal med Blockchain för att ge upplevande användarupplevelser.
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Auditable Computations on (Un)Encrypted Graph-Structured DataServio Ernesto Palacios Interiano (8635641) 29 July 2020 (has links)
<div>Graph-structured data is pervasive. Modeling large-scale network-structured datasets require graph processing and management systems such as graph databases. Further, the analysis of graph-structured data often necessitates bulk downloads/uploads from/to the cloud or edge nodes. Unfortunately, experience has shown that malicious actors can compromise the confidentiality of highly-sensitive data stored in the cloud or shared nodes, even in an encrypted form. For particular use cases —multi-modal knowledge graphs, electronic health records, finance— network-structured datasets can be highly sensitive and require auditability, authentication, integrity protection, and privacy-preserving computation in a controlled and trusted environment, i.e., the traditional cloud computation is not suitable for these use cases. Similarly, many modern applications utilize a "shared, replicated database" approach to provide accountability and traceability. Those applications often suffer from significant privacy issues because every node in the network can access a copy of relevant contract code and data to guarantee the integrity of transactions and reach consensus, even in the presence of malicious actors.</div><div><br></div><div>This dissertation proposes breaking from the traditional cloud computation model, and instead ship certified pre-approved trusted code closer to the data to protect graph-structured data confidentiality. Further, our technique runs in a controlled environment in a trusted data owner node and provides proof of correct code execution. This computation can be audited in the future and provides the building block to automate a variety of real use cases that require preserving data ownership. This project utilizes trusted execution environments (TEEs) but does not rely solely on TEE's architecture to provide privacy for data and code. We thoughtfully examine the drawbacks of using trusted execution environments in cloud environments. Similarly, we analyze the privacy challenges exposed by the use of blockchain technologies to provide accountability and traceability.</div><div><br></div><div>First, we propose AGAPECert, an Auditable, Generalized, Automated, Privacy-Enabling, Certification framework capable of performing auditable computation on private graph-structured data and reporting real-time aggregate certification status without disclosing underlying private graph-structured data. AGAPECert utilizes a novel mix of trusted execution environments, blockchain technologies, and a real-time graph-based API standard to provide automated, oblivious, and auditable certification. This dissertation includes the invention of two core concepts that provide accountability, data provenance, and automation for the certification process: Oblivious Smart Contracts and Private Automated Certifications. Second, we contribute an auditable and integrity-preserving graph processing model called AuditGraph.io. AuditGraph.io utilizes a unique block-based layout and a multi-modal knowledge graph, potentially improving access locality, encryption, and integrity of highly-sensitive graph-structured data. Third, we contribute a unique data store and compute engine that facilitates the analysis and presentation of graph-structured data, i.e., TruenoDB. TruenoDB offers better throughput than the state-of-the-art. Finally, this dissertation proposes integrity-preserving streaming frameworks at the edge of the network with a personalized graph-based object lookup.</div>
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