{"created":"2023-05-15T12:00:33.116310+00:00","id":7432,"links":{},"metadata":{"_buckets":{"deposit":"ea255ca3-aae7-4dfe-be2f-1c8fd3518306"},"_deposit":{"created_by":3,"id":"7432","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"7432"},"status":"published"},"_oai":{"id":"oai:kyutech.repo.nii.ac.jp:00007432","sets":["8:24"]},"author_link":["32087","899","32089","25154","19491"],"control_number":"7432","item_1689815586683":{"attribute_name":"CRID","attribute_value_mlt":[{"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"https://cir.nii.ac.jp/crid/1050008832583763200","subitem_relation_type_select":"URI"}}]},"item_21_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2021-05-06","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"17","bibliographicPageEnd":"19","bibliographicPageStart":"13","bibliographicVolumeNumber":"121","bibliographic_titles":[{"bibliographic_title":"電子情報通信学会技術研究報告. NS, ネットワークシステム","bibliographic_titleLang":"ja"}]}]},"item_21_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"IoT技術の発展に伴い，多くのIoTデバイスや新たなアプリケーションが出現し，大量のデータが生成されることが予想される．それらのデータには，特定の時間・場所でのみ必要とされる時空間データ(STD)が含まれる．先行研究では，時空間データを特定の期間・範囲に滞留し続ける新たなネットワークの構築を目指し，車両を用いた時空間データ滞留システム(STD-RS)を提案してきた．しかし，STD-RSを実空間で動作させた際，位置情報の誤差や受信電波強度，ソフトウェアプログラムのバグなどによる誤動作が原因で，対象とする範囲外にSTDが送信される可能性がある．STD-RSを利用するサービス提供者としては，提供範囲の信頼性確保は重要な点といえる．そこで本研究では，下位層では実空間から生成されるSTDの管理を行う一方で，上位層ではSTD-RSが誤動作していないか監査する仕組みとして，多層化ブロックチェーンを新たに提案する．STD-RSのリアルタイム監査を実現するには，ブロック探索時間の短縮化が重要となるため，総ブロック数に依存しない効率的なブロック探索手法を考案し，シミュレーション評価実験を通じて有効性を明らかにした．","subitem_description_language":"ja","subitem_description_type":"Abstract"},{"subitem_description":"With the development of IoT technology, a large number of IoT devices and new applications are expected to emerge, generating a large amount of data. These data include spatio-temporal data (STD), which is needed only at a specific time and place. In our previous research, we proposed a spatio-temporal data retention system (STD-RS) using vehicles, aiming to construct a new network that keeps spatio-temporal data in a specific period and range. However, when STD-RS is operated in real space, there is a possibility that STD is transmitted outside the target range due to malfunctions caused by errors in location information, reception signal strength, bugs in software programs, etc. As a service provider using STD-RS, it is important to ensure the reliability of the provided range. In this paper, we propose a new method for the transmission of STD-RS. In this paper, we propose a multi-layered blockchain as a mechanism to audit STD-RS in the upper layer while the lower layer manages the STD generated from the real space. In order to achieve real-time auditing of STD-RS, it is important to reduce the block search time.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_21_description_5":{"attribute_name":"備考","attribute_value_mlt":[{"subitem_description":"電子情報通信学会 ネットワークシステム研究会（NS）, 5月13日-14日, オンライン開催","subitem_description_type":"Other"}]},"item_21_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"affiliations":[{"affiliationNames":[{"lang":"ja"}]}],"givenNames":[{"givenName":"Takeshi","givenNameLang":"en"},{"givenName":"全志","givenNameLang":"ja"},{"givenName":"タケシ","givenNameLang":"ja-Kana"}]}]},"item_21_publisher_7":{"attribute_name":"出版社","attribute_value_mlt":[{"subitem_publisher":"電子情報通信学会"}]},"item_21_relation_38":{"attribute_name":"URI","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://www.ieice.org/ken/paper/20210513LC3l/","subitem_relation_type_select":"URI"}}]},"item_21_rights_13":{"attribute_name":"著作権関連情報","attribute_value_mlt":[{"subitem_rights":"Copyright (c) 2021 by 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