{"links":{},"id":9822,"metadata":{"_oai":{"id":"oai:ipsj.ixsq.nii.ac.jp:00009822","sets":["581:599:603"]},"path":["603"],"owner":"1","recid":"9822","title":["Ring Signatures: Universally Composable Definitions and Constructions"],"pubdate":{"attribute_name":"公開日","attribute_value":"2007-09-15"},"_buckets":{"deposit":"d59d6c8d-c145-4b5e-a462-8143133958d9"},"_deposit":{"id":"9822","pid":{"type":"depid","value":"9822","revision_id":0},"owners":[1],"status":"published","created_by":1},"item_title":"Ring Signatures: Universally Composable Definitions and Constructions","author_link":["0","0"],"item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Ring Signatures: Universally Composable Definitions and Constructions"},{"subitem_title":"Ring Signatures: Universally Composable Definitions and Constructions","subitem_title_language":"en"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"特集：情報システムを支えるコンピュータセキュリティ技術の再考","subitem_subject_scheme":"Other"}]},"item_type_id":"2","publish_date":"2007-09-15","item_2_text_3":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"The University of Electro-Communications"},{"subitem_text_value":"The University of Electro-Communications"}]},"item_2_text_4":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_value":"The University of Electro-Communications","subitem_text_language":"en"},{"subitem_text_value":"The University of Electro-Communications","subitem_text_language":"en"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"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/9822/files/IPSJ-JNL4809011.pdf"},"date":[{"dateType":"Available","dateValue":"2009-09-15"}],"format":"application/pdf","billing":["billing_file"],"filename":"IPSJ-JNL4809011.pdf","filesize":[{"value":"307.2 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":"8"},{"tax":["include_tax"],"price":"0","billingrole":"44"}],"accessrole":"open_date","version_id":"0ebc6bd0-3483-4675-adba-99b04926f28d","displaytype":"detail","licensetype":"license_note","license_note":"Copyright (c) 2007 by the Information Processing Society of Japan"}]},"item_2_creator_5":{"attribute_name":"著者名","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Kazuki, Yoneyama"},{"creatorName":"Kazuo, Ohta"}],"nameIdentifiers":[{}]}]},"item_2_creator_6":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Kazuki, Yoneyama","creatorNameLang":"en"},{"creatorName":"Kazuo, Ohta","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_2_source_id_9":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00116647","subitem_source_identifier_type":"NCID"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourceuri":"http://purl.org/coar/resource_type/c_6501","resourcetype":"journal article"}]},"item_2_source_id_11":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1882-7764","subitem_source_identifier_type":"ISSN"}]},"item_2_description_7":{"attribute_name":"論文抄録","attribute_value_mlt":[{"subitem_description":"Though anonymity of ring signature schemes has been studied in many publications  these papers gave different definitions and there has been no consensus. Recently  Bender  et al. proposed two new anonymity definitions of ring signature schemes which are stronger than the previous definitions  that are called anonymity against attribution attacks/full key exposure. In addition  ring signature schemes have two levels of definitions for unforgeability definitions  i.e.  existential unforgeability and strong existential unforgeability. In this paper  we will redefine anonymities and unforgeabilities within the universally composable (UC) security framework. First  we will give new ideal functionalities of ring signature schemes for each security level separately. Next  we will show the relations between game-based security definitions and our UC definitions. Finally  we will give another proof for the security of the Bender  et al.’s ring signature scheme within the UC framework. A simulator we constructed in this proof can easily simulate an adversary of existential unforgeability  which can be adaptable to the case of strong existential unforgeability if we assume the exploited signature scheme is a standard single strong existentially unforgeable signature scheme.","subitem_description_type":"Other"}]},"item_2_description_8":{"attribute_name":"論文抄録(英)","attribute_value_mlt":[{"subitem_description":"Though anonymity of ring signature schemes has been studied in many publications, these papers gave different definitions and there has been no consensus. Recently, Bender, et al. proposed two new anonymity definitions of ring signature schemes which are stronger than the previous definitions, that are called anonymity against attribution attacks/full key exposure. In addition, ring signature schemes have two levels of definitions for unforgeability definitions, i.e., existential unforgeability and strong existential unforgeability. In this paper, we will redefine anonymities and unforgeabilities within the universally composable (UC) security framework. First, we will give new ideal functionalities of ring signature schemes for each security level separately. Next, we will show the relations between game-based security definitions and our UC definitions. Finally, we will give another proof for the security of the Bender, et al.’s ring signature scheme within the UC framework. A simulator we constructed in this proof can easily simulate an adversary of existential unforgeability, which can be adaptable to the case of strong existential unforgeability if we assume the exploited signature scheme is a standard single strong existentially unforgeable signature scheme.","subitem_description_type":"Other"}]},"item_2_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicPageEnd":"2989","bibliographic_titles":[{"bibliographic_title":"情報処理学会論文誌"}],"bibliographicPageStart":"2976","bibliographicIssueDates":{"bibliographicIssueDate":"2007-09-15","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"9","bibliographicVolumeNumber":"48"}]},"relation_version_is_last":true,"item_2_alternative_title_2":{"attribute_name":"その他タイトル","attribute_value_mlt":[{"subitem_alternative_title":"セキュリティ基盤技術"}]},"weko_creator_id":"1"},"created":"2025-01-18T22:44:56.160068+00:00","updated":"2025-01-23T03:11:04.248049+00:00"}