{"links":{},"id":233808,"metadata":{"_oai":{"id":"oai:ipsj.ixsq.nii.ac.jp:00233808","sets":["1164:6389:11481:11634"]},"path":["11634"],"owner":"44499","recid":"233808","title":["ストリーム暗号ChaChaにおける線形近似式の拡張"],"pubdate":{"attribute_name":"公開日","attribute_value":"2024-03-14"},"_buckets":{"deposit":"488e97e5-c64d-43c0-8524-f041a1899287"},"_deposit":{"id":"233808","pid":{"type":"depid","value":"233808","revision_id":0},"owners":[44499],"status":"published","created_by":44499},"item_title":"ストリーム暗号ChaChaにおける線形近似式の拡張","author_link":["635909","635908","635906","635907"],"item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"ストリーム暗号ChaChaにおける線形近似式の拡張"},{"subitem_title":"Extension of the linear approximation for stream cipher ChaCha","subitem_title_language":"en"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"ICSS(5)","subitem_subject_scheme":"Other"}]},"item_type_id":"4","publish_date":"2024-03-14","item_4_text_3":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"大阪大学大学院工学研究科"},{"subitem_text_value":"大阪大学大学院工学研究科／北陸先端科学技術大学院大学"}]},"item_4_text_4":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_value":"Graduate School of Engineering Osaka University","subitem_text_language":"en"},{"subitem_text_value":"Graduate School of Engineering Osaka University / Japan Advanced Institute of Science and Technology","subitem_text_language":"en"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"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/233808/files/IPSJ-SPT24054037.pdf","label":"IPSJ-SPT24054037.pdf"},"format":"application/pdf","billing":["billing_file"],"filename":"IPSJ-SPT24054037.pdf","filesize":[{"value":"1.4 MB"}],"mimetype":"application/pdf","priceinfo":[{"tax":["include_tax"],"price":"0","billingrole":"46"},{"tax":["include_tax"],"price":"0","billingrole":"44"}],"accessrole":"open_login","version_id":"3eb4cbb3-7571-4784-b71a-079ff5a0b792","displaytype":"detail","licensetype":"license_note","license_note":"Copyright (c) 2024 by the Institute of Electronics, Information and Communication Engineers This SIG report is only available to those in membership of the SIG."}]},"item_4_creator_5":{"attribute_name":"著者名","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"岡田, 侑里英"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"宮地, 充子"}],"nameIdentifiers":[{}]}]},"item_4_creator_6":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Yurie, Okada","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Atsuko, Miyaji","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_4_source_id_9":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA12628305","subitem_source_identifier_type":"NCID"}]},"item_4_textarea_12":{"attribute_name":"Notice","attribute_value_mlt":[{"subitem_textarea_value":"SIG Technical Reports are nonrefereed and hence may later appear in any journals, conferences, symposia, etc."}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourceuri":"http://purl.org/coar/resource_type/c_18gh","resourcetype":"technical report"}]},"item_4_source_id_11":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"2188-8671","subitem_source_identifier_type":"ISSN"}]},"item_4_description_7":{"attribute_name":"論文抄録","attribute_value_mlt":[{"subitem_description":"IETF が標準化した暗号化プロトコル TLS1.3 では，ストリーム暗号として ChaCha のみが採用されており，現在その脆弱性解析が数多く行われている．主な解析手法として，入力に差分を与え出力差分との関係を用いる差分解析，線形近似式を用いる線形解析，二つを組み合わせる差分線形解析が挙げられる．本研究では，ChaCha における入力差分についての再評価，既存の線形近似式のラウンド数の拡張により，7.25 ラウンド，7.5 ラウンド ChaCha に対する安全性解析を行った．","subitem_description_type":"Other"}]},"item_4_description_8":{"attribute_name":"論文抄録(英)","attribute_value_mlt":[{"subitem_description":"The IETF-standardized encryption protocol TLS1.3 uses only ChaCha as a stream cipher, and many vulnerability analyses are currently being conducted. In this study, we extend the number of rounds of the existing linear approximation formula for ChaCha, reevaluate the input/output difference, and perform a difference linear analysis for 7.25 and 7.5 rounds ChaCha.","subitem_description_type":"Other"}]},"item_4_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicPageEnd":"6","bibliographic_titles":[{"bibliographic_title":"研究報告セキュリティ心理学とトラスト（SPT）"}],"bibliographicPageStart":"1","bibliographicIssueDates":{"bibliographicIssueDate":"2024-03-14","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"37","bibliographicVolumeNumber":"2024-SPT-54"}]},"relation_version_is_last":true,"weko_creator_id":"44499"},"created":"2025-01-19T01:35:24.098285+00:00","updated":"2025-01-19T09:58:42.955794+00:00"}