{"metadata":{"_oai":{"id":"oai:ipsj.ixsq.nii.ac.jp:00217008","sets":["1164:2836:10841:10842"]},"path":["10842"],"owner":"44499","recid":"217008","title":["Forward-Secureなカメレオンハッシュ関数"],"pubdate":{"attribute_name":"公開日","attribute_value":"2022-03-03"},"_buckets":{"deposit":"728a8615-969d-4b2d-963c-2f1c57545691"},"_deposit":{"id":"217008","pid":{"type":"depid","value":"217008","revision_id":0},"owners":[44499],"status":"published","created_by":44499},"item_title":"Forward-Secureなカメレオンハッシュ関数","author_link":["561345","561346","561347"],"item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Forward-Secureなカメレオンハッシュ関数"},{"subitem_title":"Forward-Secure Chameleon Hash Function","subitem_title_language":"en"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"暗号","subitem_subject_scheme":"Other"}]},"item_type_id":"4","publish_date":"2022-03-03","item_4_text_3":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"大阪大学"},{"subitem_text_value":"大阪大学"},{"subitem_text_value":"大阪大学/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":"Osaka University","subitem_text_language":"en"},{"subitem_text_value":"Osaka University","subitem_text_language":"en"},{"subitem_text_value":"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/217008/files/IPSJ-DPS22190024.pdf","label":"IPSJ-DPS22190024.pdf"},"date":[{"dateType":"Available","dateValue":"2024-03-03"}],"format":"application/pdf","billing":["billing_file"],"filename":"IPSJ-DPS22190024.pdf","filesize":[{"value":"822.9 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":"34"},{"tax":["include_tax"],"price":"0","billingrole":"44"}],"accessrole":"open_date","version_id":"4c1baca3-4a39-4dbd-a90e-37a84a992cc8","displaytype":"detail","licensetype":"license_note","license_note":"Copyright (c) 2022 by the Information Processing Society of Japan"}]},"item_4_creator_5":{"attribute_name":"著者名","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"松原, 功樹"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Tian, Yangguang"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"宮地, 充子"}],"nameIdentifiers":[{}]}]},"item_4_source_id_9":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN10116224","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":"2188-8906","subitem_source_identifier_type":"ISSN"}]},"item_4_description_7":{"attribute_name":"論文抄録","attribute_value_mlt":[{"subitem_description":"カメレオンハッシュ関数 (CH) は秘密鍵と公開鍵のペアを持つハッシュ関数である.CH は秘密鍵を持たないユーザには衝突に強いハッシュ関数となるが,秘密鍵を持っているユーザはハッシュ値の衝突を発見することができる.CHは,Shamir らによるオンライン/オフライン署名や Ateniese らによるブロックチェーンの修正などを始めとする様々な暗号方式で利用されている.しかし,CH において一度秘密鍵が露呈した場合その耐衝突性は失われ,既存の CH ベースの手法の安全性は保証されない.そこで本研究では,新たに Forward-Secure な CH (FS-CH) を提案する.この手法では,秘密鍵を持つユーザは定期的に秘密鍵を更新することができる.これにより,現在の秘密鍵が露呈しても過去に計算されたハッシュ値に関する衝突は発見されず,秘密鍵漏洩によるリスクの軽減を実現した.","subitem_description_type":"Other"}]},"item_4_description_8":{"attribute_name":"論文抄録(英)","attribute_value_mlt":[{"subitem_description":"Chameleon Hash Function (CH) is a hash function with a secret and public key pair. CH is collision resistant for users without a secret key, while users with a secret key can find collisions in hash values. CH has been used in various cryptographic schemes, including online/offline signatures by Shamir et al. and blockchain modification by Ateniese et al. However, once the secret key is exposed in CH, its collision resistance is lost, and the security of existing CH-based methods cannot be guaranteed. In this paper, we propose a new Forward-Secure CH (FS-CH). In this method, a user with a secret key can update the secret key periodically. In this way, even if the current secret key is exposed, collisions related to hash values calculated in the past will not be found, thereby reducing the risk of secret key leakage.","subitem_description_type":"Other"}]},"item_4_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicPageEnd":"8","bibliographic_titles":[{"bibliographic_title":"研究報告マルチメディア通信と分散処理(DPS)"}],"bibliographicPageStart":"1","bibliographicIssueDates":{"bibliographicIssueDate":"2022-03-03","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"24","bibliographicVolumeNumber":"2022-DPS-190"}]},"relation_version_is_last":true,"weko_creator_id":"44499"},"id":217008,"updated":"2025-01-19T15:39:31.361217+00:00","links":{},"created":"2025-01-19T01:17:31.052779+00:00"}