@techreport{oai:ipsj.ixsq.nii.ac.jp:00227043,
 author = {陳, 加偉 and 趙, 亨騄 and 佐藤, 慎悟 and 四方, 順司 and Jiawei, Chen and Hyungrok, Jo and Shingo, Sato and Junji, Shikata},
 issue = {36},
 month = {Jul},
 note = {本論文では，超特異楕円曲線の同種写像問題に基づく，安全性帰着がタイトな ID ベース署名 (Identity-based Signature, IBS) 方式を提案する．既存方式として Shaw とDutta によって同種写像ベース IBS の直接的な構成が提案されたが，その安全性証明はタイトでない．これを改善するため，タイトな安全性を達成する同種写像ベース署名方式 Lossy CSI-FiSh を用いる．Lossy CSI-FiSh に基づいた IBS 方式を提案し，この方式に対してタイトな安全性証明を示す．さらに，適切なパラメータ設定の下で鍵サイズと署名サイズの比較・解析を行う．, In this paper, we propose an identity-based signature (IBS) scheme based on the supersingular isogeny problem, with tightly security reduction. While Shaw and Dutta have proposed a direct construction of isogeny-based IBS as an existing scheme, its security proof is not tight. To address this issue, we utilize a tightly secure isogeny-based signature scheme Lossy CSI-FiSh. We present an IBS scheme based on the Lossy CSI-FiSh scheme and provide a tight security proof for this scheme. Furthermore, we conduct a comparative analysis of key size and signature size for the isogeny-based IBS scheme under suitable parameter settings. The full version of this paper will be appeared in the proceedings of the 14th International Conference on Post-Quantum Cryptography (PQCrypto 2023).},
 title = {安全性帰着がタイトな同種写像に基づくIDベース署名方式},
 year = {2023}
}