{"updated":"2025-01-19T12:05:46.512113+00:00","metadata":{"_oai":{"id":"oai:ipsj.ixsq.nii.ac.jp:00227697","sets":["581:11107:11118"]},"path":["11118"],"owner":"44499","recid":"227697","title":["Cryptanalysis on End-to-End Encryption Schemes of Communication Tools and Its Research Trend"],"pubdate":{"attribute_name":"公開日","attribute_value":"2023-09-15"},"_buckets":{"deposit":"eaeff0ff-39e5-43be-b98b-b3bed03e96d6"},"_deposit":{"id":"227697","pid":{"type":"depid","value":"227697","revision_id":0},"owners":[44499],"status":"published","created_by":44499},"item_title":"Cryptanalysis on End-to-End Encryption Schemes of Communication Tools and Its Research Trend","author_link":["606784","606787","606782","606783","606785","606786"],"item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Cryptanalysis on End-to-End Encryption Schemes of Communication Tools and Its Research Trend"},{"subitem_title":"Cryptanalysis on End-to-End Encryption Schemes of Communication Tools and Its Research Trend","subitem_title_language":"en"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"[特集:サイバー空間を安全にするコンピュータセキュリティ技術（招待論文）] End-to-End Encryption, LINE, SFrame, Zoom, Impersonation Attack, Forgery Attack","subitem_subject_scheme":"Other"}]},"item_type_id":"2","publish_date":"2023-09-15","item_2_text_3":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"University of Hyogo／NICT"},{"subitem_text_value":"NICT"},{"subitem_text_value":"NEC／Yokohama National University"}]},"item_2_text_4":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_value":"University of Hyogo / NICT","subitem_text_language":"en"},{"subitem_text_value":"NICT","subitem_text_language":"en"},{"subitem_text_value":"NEC / Yokohama National University","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/227697/files/IPSJ-JNL6409002.pdf","label":"IPSJ-JNL6409002.pdf"},"date":[{"dateType":"Available","dateValue":"2025-09-15"}],"format":"application/pdf","billing":["billing_file"],"filename":"IPSJ-JNL6409002.pdf","filesize":[{"value":"1.1 MB"}],"mimetype":"application/pdf","priceinfo":[{"tax":["include_tax"],"price":"0","billingrole":"5"},{"tax":["include_tax"],"price":"0","billingrole":"6"},{"tax":["include_tax"],"price":"0","billingrole":"8"},{"tax":["include_tax"],"price":"0","billingrole":"44"}],"accessrole":"open_date","version_id":"b7beab8e-d856-42eb-af7e-617b05a8cf94","displaytype":"detail","licensetype":"license_note","license_note":"Copyright (c) 2023 by the Information Processing Society of Japan"}]},"item_2_creator_5":{"attribute_name":"著者名","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Takanori, Isobe"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Ryoma, Ito"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kazuhiko, Minematsu"}],"nameIdentifiers":[{}]}]},"item_2_creator_6":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Takanori, Isobe","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Ryoma, Ito","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kazuhiko, Minematsu","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_publisher_15":{"attribute_name":"公開者","attribute_value_mlt":[{"subitem_publisher":"情報処理学会","subitem_publisher_language":"ja"}]},"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":"This paper summarizes our cryptanalysis results on real-world End-to-End Encryption (E2EE) schemes published in recent years. Our targets are LINE (a major messaging application), SFrame (an E2EE protocol adopted by major video/audio applications), and Zoom (a major video communication application). For LINE, we show several attacks against the message integrity of Letter Sealing, the E2EE protocol of LINE, that allow forgery and impersonation. For SFrame, we reveal a critical issue that leads to an impersonation (forgery) attack by a malicious group member with a practical complexity. For Zoom, we discover several attacks more powerful than those expected by Zoom according to their whitepaper. Specifically, if insiders collude with meeting participants, they can impersonate any Zoom user in target meetings, whereas Zoom indicates that they can impersonate only the current meeting participants. We also describe several important works in the area of E2EE security research.\n------------------------------\nThis is a preprint of an article intended for publication Journal of\nInformation Processing(JIP). This preprint should not be cited. This\narticle should be cited as: Journal of Information Processing Vol.31(2023) (online)\nDOI　http://dx.doi.org/10.2197/ipsjjip.31.523\n------------------------------","subitem_description_type":"Other"}]},"item_2_description_8":{"attribute_name":"論文抄録(英)","attribute_value_mlt":[{"subitem_description":"This paper summarizes our cryptanalysis results on real-world End-to-End Encryption (E2EE) schemes published in recent years. Our targets are LINE (a major messaging application), SFrame (an E2EE protocol adopted by major video/audio applications), and Zoom (a major video communication application). For LINE, we show several attacks against the message integrity of Letter Sealing, the E2EE protocol of LINE, that allow forgery and impersonation. For SFrame, we reveal a critical issue that leads to an impersonation (forgery) attack by a malicious group member with a practical complexity. For Zoom, we discover several attacks more powerful than those expected by Zoom according to their whitepaper. Specifically, if insiders collude with meeting participants, they can impersonate any Zoom user in target meetings, whereas Zoom indicates that they can impersonate only the current meeting participants. We also describe several important works in the area of E2EE security research.\n------------------------------\nThis is a preprint of an article intended for publication Journal of\nInformation Processing(JIP). This preprint should not be cited. This\narticle should be cited as: Journal of Information Processing Vol.31(2023) (online)\nDOI　http://dx.doi.org/10.2197/ipsjjip.31.523\n------------------------------","subitem_description_type":"Other"}]},"item_2_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographic_titles":[{"bibliographic_title":"情報処理学会論文誌"}],"bibliographicIssueDates":{"bibliographicIssueDate":"2023-09-15","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"9","bibliographicVolumeNumber":"64"}]},"relation_version_is_last":true,"weko_creator_id":"44499"},"created":"2025-01-19T01:26:57.118858+00:00","id":227697,"links":{}}