| fullrecord |
[{"key": "dc.contributor.advisor", "value": "Sepp\u00e4nen, Ville", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Kivinen, Miikka", "language": "", "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2020-02-03T06:13:50Z", "language": null, "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2020-02-03T06:13:50Z", "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/123456789/67689", "language": null, "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "Lohkoketjut ovat P2P-verkossa toimivia hajautettuja tietokantoja, jotka tallentavat k\u00e4ytt\u00e4jien luomat digitaalisesti allekirjoitetut transaktiot ketjun lohkoihin. Lohkoketjussa toimivat verkon solmut vahvistavat ja kokoavat transaktiot lohkoihin, jotka linkitet\u00e4\u00e4n toisiinsa ja lis\u00e4t\u00e4\u00e4n ketjuun konsensusprotokollaa avuksi k\u00e4ytt\u00e4en. Jokainen verkon solmu pit\u00e4\u00e4 itsell\u00e4\u00e4n kopiota ketjusta, jolloin datan muuttaminen j\u00e4lkik\u00e4teen on mahdotonta. Hajautetun luonteen ja kryptografiaan perustuvan linkityksen ansiosta tarjotaan teoriassa muuttumaton ja luotettava tilikirja. Lohkoketjut ovat l\u00e4hivuosina saaneet paljon huomiota monilta tahoilta ja niist\u00e4 on povattu perinteisten tietokantojen korvaajaa monilla toimialoilla. Teknologia on kuitenkin nuori ja siihen liittyy viel\u00e4 monia ongelmakohtia. Esimerkiksi erilaiset turvallisuuteen ja skaalautuvuuteen liittyv\u00e4t ongelmat vaikuttavat lohkoketjuratkaisujen k\u00e4ytt\u00f6\u00f6nottoon, jolloin niiden syit\u00e4 ja ratkaisuja on syyt\u00e4 tutkia. Lis\u00e4ksi lohkoketjun k\u00e4ytt\u00f6 ei ole aina j\u00e4rkev\u00e4\u00e4, sill\u00e4 se eroaa perinteisist\u00e4 tietokannoista v\u00e4lill\u00e4 perustavanlaatuisesti. T\u00e4ss\u00e4 tutkielmassa pyrit\u00e4\u00e4n selvitt\u00e4m\u00e4\u00e4n mitk\u00e4 tekij\u00e4t vaikuttavat lohkoketjuratkaisujen k\u00e4ytt\u00f6\u00f6nottoon yrityksiss\u00e4. Kirjallisuuskatsauksessa selvitet\u00e4\u00e4n k\u00e4ytt\u00f6\u00f6nottoon vaikuttavat turvallisuustekij\u00e4t, skaalautuvuuden t\u00e4rkeys sek\u00e4 yleiskuva mahdollisen lohkoketjuratkaisun tuomista kustannuksista. Lis\u00e4ksi tutkielmassa esitet\u00e4\u00e4n p\u00e4\u00e4t\u00f6spuumalli, jolla voidaan perustella tarve lohkoketjun k\u00e4yt\u00f6lle.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by Miia Hakanen (mihakane@jyu.fi) on 2020-02-03T06:13:49Z\nNo. of bitstreams: 0", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2020-02-03T06:13:50Z (GMT). No. of bitstreams: 0\n Previous issue date: 2020", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "29", "language": "", "element": "format", "qualifier": "extent", "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": "Bitcoin", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "Ethereum", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "skaalautuvuus", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "implementointi", "language": "", "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "Lohkoketjusovellukset ja haasteet niiden k\u00e4ytt\u00f6\u00f6notossa", "language": "", "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "bachelor thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-202002031953", "language": "", "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Bachelor's thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Kandidaatinty\u00f6", "language": "fi", "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_7a1f", "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": "bachelorThesis", "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": "yksityisyys", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "turvallisuus", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "lohkoketjut", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}]
|