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[{"key": "dc.contributor.advisor", "value": "Hara, Veikko", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.advisor", "value": "Kypp\u00f6, Jorma", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Stenberg, Johannes", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2020-02-04T06:50:28Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2020-02-04T06:50:28Z", "language": null, "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2020", "language": "", "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/67705", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Avoimen datan periaatteena on se, ett\u00e4 julkiseen k\u00e4ytt\u00f6\u00f6n julkaistu data ja tieto sen alkuper\u00e4st\u00e4 ovat aina saatavilla. N\u00e4m\u00e4 periaatteet eiv\u00e4t kuitenkaan v\u00e4ltt\u00e4m\u00e4tt\u00e4 aina toteudu keskitettyyn tietovarastointiin tai keskeisen tahon hallintaan perustuvissa ratkaisuissa. Vaihtoehtona on tietovarastointi, jossa tallennettu data sijaitsee hajautetusti vertaisverkon noodeilla ja jossa lohkoketjua k\u00e4ytet\u00e4\u00e4n datan alkuper\u00e4tietojen tallentamiseen. Tutkielma toteutettiin suunnittelutieteellisen\u00e4 tutkimuksena, ja sen tuloksena luotiin suunnitteluartefakti. Artefakti koostuu ohjelmointiprototyypist\u00e4 sek\u00e4 prototyypin suunnitelmasta, johon sis\u00e4ltyy my\u00f6s avoimen datan vertaisverkkopohjaisen tallentamisen vaatimusm\u00e4\u00e4rittely.\n\nArtefaktin suunnittelussa ja toteutuksessa hy\u00f6dynnettiin Ethereum-lohkoketjua, \u00e4lysopimuksia, sek\u00e4 IPFS-tiedostojakelu- ja -varastointiprotokollaa. Keskeisimpin\u00e4 tuloksina havaittiin, ett\u00e4 hajautettu tallennus lis\u00e4\u00e4 datan saatavuutta ja ett\u00e4 lohkoketjussa saadaan s\u00e4il\u00f6tty\u00e4 varmennettuna alkuper\u00e4tietoja. IPFS-pohjainen tallentaminen vaatii erillisen tietokantatason, jotta datan hakeminen olisi mahdollista. Havaittiin my\u00f6s, ett\u00e4 hajautetussa varastoinnissa t\u00e4ytyy valita, painotetaanko datan saatavuutta vai eheytt\u00e4.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "One of the principles of open data is that public data and the information about its origin should be publicly available. However, this principle doesn\u2019t always apply when open data is stored in a centralized fashion or when controlled by a single entity. An alternative model is to store data in a decentralized, peer-to-peer storage, where the data would be stored by multiple peers, and the provenance information of the data would be stored in a blockchain. This research was conducted according to Design science research (DSR) principles, and its main result is a design artefact. The artefact consists of a software prototype, and the design of the prototype, which also includes the requirements for the decentralized storing of open data.\nThe technologies used in the implementation of the artefact were Ethereum blockchain and smart contracts, and the IPFS protocol. The most relevant research finding was that the blockchain can be utilized in storing provenance information. IPFS-based storage needed a database layer to enable querying of data. Other finding was that in a distributed storage scheme, one must choose between data availability and consistency.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Miia Hakanen (mihakane@jyu.fi) on 2020-02-04T06:50:27Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2020-02-04T06:50:28Z (GMT). No. of bitstreams: 0\n Previous issue date: 2020", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "60", "language": "", "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "fin", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "\u00e4lysopimukset", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Lohkoketjut ja hajautettu tietovarastointi avoimen datan tukena", "language": "", "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-202002041962", "language": "", "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Informaatioteknologian tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Information Technology", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Informaatioteknologia", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Information Technology", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Tietoj\u00e4rjestelm\u00e4tiede", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Information Systems Science", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": null, "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "601", "language": "", "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "tietovarastot", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "data", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "avoin tieto", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "vertaisverkot", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "lohkoketjut", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.format.content", "value": "fulltext", "language": null, "element": "format", "qualifier": "content", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}, {"key": "dc.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
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