{"metadata":{"_oai":{"id":"oai:ipsj.ixsq.nii.ac.jp:00214430","sets":["6164:6165:6462:10749"]},"path":["10749"],"owner":"44499","recid":"214430","title":["準同型暗号を用いたスケーラブルかつE2EEな音声重ね合わせの実装"],"pubdate":{"attribute_name":"公開日","attribute_value":"2021-10-19"},"_buckets":{"deposit":"b51532f6-46d6-409b-acba-774726b954a6"},"_deposit":{"id":"214430","pid":{"type":"depid","value":"214430","revision_id":0},"owners":[44499],"status":"published","created_by":44499},"item_title":"準同型暗号を用いたスケーラブルかつE2EEな音声重ね合わせの実装","author_link":["550515","550511","550517","550514","550516","550512","550518","550513"],"item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"準同型暗号を用いたスケーラブルかつE2EEな音声重ね合わせの実装"},{"subitem_title":"The Scalable E2EE Sound Addition System by Additive Homomorphic Cryptosystem","subitem_title_language":"en"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"準同型暗号，実装，楕円曲線暗号","subitem_subject_scheme":"Other"}]},"item_type_id":"18","publish_date":"2021-10-19","item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_18_text_3":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"NTT社会情報研究所"},{"subitem_text_value":"サイボウズ・ラボ"},{"subitem_text_value":"NTT社会情報研究所"},{"subitem_text_value":"NTT社会情報研究所"}]},"item_18_text_4":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_value":"NTT Social Informatics Laboratories","subitem_text_language":"en"},{"subitem_text_value":"Cybozu Labs","subitem_text_language":"en"},{"subitem_text_value":"NTT Social Informatics Laboratories","subitem_text_language":"en"},{"subitem_text_value":"NTT Social Informatics Laboratories","subitem_text_language":"en"}]},"item_publisher":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"情報処理学会","subitem_publisher_language":"ja"}]},"publish_status":"0","weko_shared_id":-1,"item_file_price":{"attribute_name":"Billing file","attribute_type":"file","attribute_value_mlt":[{"url":{"url":"https://ipsj.ixsq.nii.ac.jp/record/214430/files/IPSJCSS2021031.pdf","label":"IPSJCSS2021031.pdf"},"date":[{"dateType":"Available","dateValue":"2023-10-19"}],"format":"application/pdf","billing":["billing_file"],"filename":"IPSJCSS2021031.pdf","filesize":[{"value":"967.7 kB"}],"mimetype":"application/pdf","priceinfo":[{"tax":["include_tax"],"price":"660","billingrole":"5"},{"tax":["include_tax"],"price":"330","billingrole":"6"},{"tax":["include_tax"],"price":"0","billingrole":"30"},{"tax":["include_tax"],"price":"0","billingrole":"46"},{"tax":["include_tax"],"price":"0","billingrole":"44"}],"accessrole":"open_date","version_id":"156632ff-356b-46dd-925c-2963e0b3f8ff","displaytype":"detail","licensetype":"license_note","license_note":"Copyright (c) 2021 by the Information Processing Society of Japan"}]},"item_18_creator_5":{"attribute_name":"著者名","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"上野, 真奈"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"光成, 滋生"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"小林, 鉄太郎"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"村上, 啓造"}],"nameIdentifiers":[{}]}]},"item_18_creator_6":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Mana, Ueno","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Shigeo, Mitsunari","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Tetsutaro, Kobayashi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Keizo, Murakami","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourceuri":"http://purl.org/coar/resource_type/c_5794","resourcetype":"conference paper"}]},"item_18_description_7":{"attribute_name":"論文抄録","attribute_value_mlt":[{"subitem_description":"本研究はウェブ会議などのオンラインコミュニケーションツールにおけるスケーラビリティと E2EE の両立を目的として，楕円 Lifted ElGamal 暗号を用いた暗号化済み音声データ重ね合わせを実装する．楕円 Lifted ElGamal 暗号を用いることで従来の E2EE オンラインコミュニケーションではできなかった，サービス提供サーバにおける演算処理が可能となり，スケーラビリティの大幅な改善を見込むことができる．一方で，演算コストの大幅な増加が問題となる．そこで，本研究では暗号化済み音声データ重ね合わせを実装し，各演算処理の速度を測定，リアルタイム通信が可能な処理速度であるかを検証する．測定は複数の楕円曲線に対して行い，最適な楕円曲線の検討も行った．この評価実験の結果，256 ビットの楕円曲線を用い，かつ移動端末の上り通信速度で音声通話のみの実施を仮定した場合，最大 1024 人まで同時接続した状態で，暗号化または復号の処理をリアルタイムで実施できることが明らかになった．","subitem_description_type":"Other"}]},"item_18_description_8":{"attribute_name":"論文抄録(英)","attribute_value_mlt":[{"subitem_description":"For scalable E2EE online communication systems, such as web conferencing, we implemented the encrypted sound data addition system with additive homomorphic cryptosystem, Elliptic Curve Lifted ElGamal (EC Lifted ElGamal) cryptosystem. In the implementation with EC Lifted ElGamal cryptosystem, the biggest problem is an increase of the computational cost for encryption, addition and decryption processes. In this study, we measured the speed of each processing time with several elliptic curves, and veried whether the speed is enough for real-time communication. We conrmed that our system enables encryption or decryption on time in voice communication with more than 1024 person's connection. ","subitem_description_type":"Other"}]},"item_18_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicPageEnd":"230","bibliographic_titles":[{"bibliographic_title":"コンピュータセキュリティシンポジウム2021論文集"}],"bibliographicPageStart":"223","bibliographicIssueDates":{"bibliographicIssueDate":"2021-10-19","bibliographicIssueDateType":"Issued"}}]},"relation_version_is_last":true,"weko_creator_id":"44499"},"id":214430,"updated":"2025-01-19T16:38:08.786061+00:00","links":{},"created":"2025-01-19T01:15:14.815489+00:00"}