{"id":240790,"metadata":{"_oai":{"id":"oai:ipsj.ixsq.nii.ac.jp:00240790","sets":["6164:6165:6462:11854"]},"path":["11854"],"owner":"11","recid":"240790","title":["CCA安全な登録ベース暗号"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2024-10-15"},"_buckets":{"deposit":"1dcdd24e-c69d-4f44-81f6-569b42a02eb2"},"_deposit":{"id":"240790","pid":{"type":"depid","value":"240790","revision_id":0},"owners":[11],"status":"published","created_by":11},"item_title":"CCA安全な登録ベース暗号","author_link":["661304","661305","661306","661307","661308","661309","661310","661311","661312","661313"],"item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"CCA安全な登録ベース暗号","subitem_title_language":"ja"},{"subitem_title":"Chosen-Ciphertext Secure Registration-Based Encryption","subitem_title_language":"en"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"鍵預託問題，登録ベース暗号，CCA 安全性，藤崎・岡本変換","subitem_subject_scheme":"Other"}]},"item_type_id":"18","publish_date":"2024-10-15","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":"横浜国立大学"},{"subitem_text_value":"産業技術総合研究所／横浜国立大学"},{"subitem_text_value":"産業技術総合研究所"},{"subitem_text_value":"横浜国立大学"},{"subitem_text_value":"横浜国立大学"}]},"item_18_text_4":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_value":"Yokohama National University","subitem_text_language":"en"},{"subitem_text_value":"National Institute of Advanced Industrial Science and Technology / Yokohama National University","subitem_text_language":"en"},{"subitem_text_value":"National Institute of Advanced Industrial Science and Technology","subitem_text_language":"en"},{"subitem_text_value":"Yokohama National University","subitem_text_language":"en"},{"subitem_text_value":"Yokohama National University","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/240790/files/IPSJ-CSS2024044.pdf","label":"IPSJ-CSS2024044.pdf"},"date":[{"dateType":"Available","dateValue":"2026-10-15"}],"format":"application/pdf","billing":["billing_file"],"filename":"IPSJ-CSS2024044.pdf","filesize":[{"value":"351.5 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":"b60b8fc8-03a6-4605-bf5b-0f350de5e56d","displaytype":"detail","licensetype":"license_note","license_note":"Copyright (c) 2024 by the Information Processing Society of Japan"}]},"item_18_creator_5":{"attribute_name":"著者名","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"知久, 奏斗"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"原, 啓祐"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"橋本, 啓太郎"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"冨田, 斗威"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"四方, 順司"}],"nameIdentifiers":[{}]}]},"item_18_creator_6":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Sohto, Chiku","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Keisuke, Hara","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Keitaro, Hashimoto","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Toi, Tomita","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Junji, Shikata","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":"近年，IDベース暗号における鍵鍵預託問題解決するため登録ベース暗号(RBE)が提案された．これまで様々なRBE方式が提案されてきたが，それらは選択平文攻撃（CPA）に対する安全性しか考慮していない．一方で，現実的なシステムには選択暗号文攻撃（CCA）に対する安全性が必要である．Glaeserら[ACM CCS'23]は，選択暗号文攻撃(CCA)に対して安全なRBEを実現するため，RBE方式においても藤崎・岡本(FO)変換[CRYPTO'99]が利用できることを示唆したが，その正式な解析は行っていない．本研究では，RBEに対して古典的なFO変換を適用することが自明でないことを明らかにし，RBEに適したFO変換を提案する．","subitem_description_type":"Other"}]},"item_18_description_8":{"attribute_name":"論文抄録(英)","attribute_value_mlt":[{"subitem_description":"Registration-based encryption (RBE) is a solution for the key-escrow problem in identity-based encryption. Existing schemes are inadequate for real-world systems because they only consider security against chosen plaintext attacks (CPA), and many real-world cryptographic schemes require security against chosen cipher attacks (CCA). Recently, Glaeser et al. [ACM CCS'23] presented a solution to this problem. They suggested the usage of the original Fujisaki-Okamoto (FO) transformation [CRYPTO'99] to realize CCA-secure RBE. \nHowever, they did not provide its formal analysis because they considered it can be applied in a straightforward manner. In this work, we clarify that applying the classical FO transformation to RBE is nontrivial and provides a suitable FO transformation for RBE. ","subitem_description_type":"Other"}]},"item_18_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicPageEnd":"326","bibliographic_titles":[{"bibliographic_title":"コンピュータセキュリティシンポジウム2024論文集"}],"bibliographicPageStart":"319","bibliographicIssueDates":{"bibliographicIssueDate":"2024-10-15","bibliographicIssueDateType":"Issued"}}]},"relation_version_is_last":true,"weko_creator_id":"11"},"updated":"2025-03-06T05:31:35.066004+00:00","created":"2025-01-19T01:45:10.826426+00:00","links":{}}