{"_buckets": {"deposit": "249cf029-62b3-49c0-96fa-f32cb1c656ba"}, "_deposit": {"id": "2010198", "owners": [1], "pid": {"revision_id": 0, "type": "depid", "value": "2010198"}, "status": "published"}, "_oai": {"id": "oai:u-ryukyu.repo.nii.ac.jp:02010198", "sets": ["1642837640949", "1642838406414"]}, "author_link": [], "item_1617186331708": {"attribute_name": "Title", "attribute_value_mlt": [{"subitem_1551255647225": "On the security of Zhang-Tan\u0027s variants of multivariate signature shemes", "subitem_1551255648112": "en"}]}, "item_1617186419668": {"attribute_name": "Creator", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Hashimoto, Yasufumi", "creatorNameLang": "en"}]}]}, "item_1617186476635": {"attribute_name": "Access Rights", "attribute_value_mlt": [{"subitem_1522299639480": "open access", "subitem_1600958577026": "http://purl.org/coar/access_right/c_abf2"}]}, "item_1617186626617": {"attribute_name": "Description", "attribute_value_mlt": [{"subitem_description": "Until now, various multivariate public key cryptosystems (MPKCs) have been proposed but some of them are known to be insecure. In IMACC 2015 and Inscrypt 2015, Zhang and Tan proposed new variants of MPKCs for signatures to enhance the security of the original schemes. However, Zhang-Tan\u2019s variants are much less secure than expected. In this paper, we describe an attack on Zhang-Tan\u2019s variants to recover a public key of the original scheme.", "subitem_description_type": "Other"}, {"subitem_description": "\u7d00\u8981\u8ad6\u6587", "subitem_description_type": "Other"}]}, "item_1617186643794": {"attribute_name": "Publisher", "attribute_value_mlt": [{"subitem_1522300295150": "en", "subitem_1522300316516": "Department of Mathematical Sciences, Faculty of Science, University of the Ryukyus"}, {"subitem_1522300295150": "ja", "subitem_1522300316516": "\u7409\u7403\u5927\u5b66\u7406\u5b66\u90e8\u6570\u7406\u79d1\u5b66\u6559\u5ba4"}]}, "item_1617186702042": {"attribute_name": "Language", "attribute_value_mlt": [{"subitem_1551255818386": "eng"}]}, "item_1617186783814": {"attribute_name": "Identifier", "attribute_value_mlt": [{"subitem_identifier_type": "HDL", "subitem_identifier_uri": "http://hdl.handle.net/20.500.12000/43148"}]}, "item_1617186920753": {"attribute_name": "Source Identifier", "attribute_value_mlt": [{"subitem_1522646500366": "ISSN", "subitem_1522646572813": "2434-6071"}]}, "item_1617186941041": {"attribute_name": "Source Title", "attribute_value_mlt": [{"subitem_1522650068558": "en", "subitem_1522650091861": "Ryukyu mathematical journal"}]}, "item_1617187056579": {"attribute_name": "Bibliographic Information", "attribute_value_mlt": [{"bibliographicPageEnd": "5", "bibliographicPageStart": "1", "bibliographicVolumeNumber": "31"}]}, "item_1617258105262": {"attribute_name": "Resource Type", "attribute_value_mlt": [{"resourcetype": "departmental bulletin paper", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_1617265215918": {"attribute_name": "Version Type", "attribute_value_mlt": [{"subitem_1522305645492": "VoR", "subitem_1600292170262": "http://purl.org/coar/version/c_970fb48d4fbd8a85"}]}, "item_1617605131499": {"attribute_name": "File", "attribute_type": "file", "attribute_value_mlt": [{"accessrole": "open_access", "download_preview_message": "", "file_order": 0, "filename": "vol31p001.pdf", "future_date_message": "", "is_thumbnail": false, "mimetype": "", "size": 0, "url": {"objectType": "fulltext", "url": "https://u-ryukyu.repo.nii.ac.jp/record/2010198/files/vol31p001.pdf"}, "version_id": "2d389b82-b3cd-4c3f-b900-5bca4f00956f"}]}, "item_title": "On the security of Zhang-Tan\u0027s variants of multivariate signature shemes", "item_type_id": "15", "owner": "1", "path": ["1642837640949", "1642838406414"], "permalink_uri": "http://hdl.handle.net/20.500.12000/43148", "pubdate": {"attribute_name": "PubDate", "attribute_value": "2019-01-15"}, "publish_date": "2019-01-15", "publish_status": "0", "recid": "2010198", "relation": {}, "relation_version_is_last": true, "title": ["On the security of Zhang-Tan\u0027s variants of multivariate signature shemes"], "weko_shared_id": -1}