Efficient fair exchange with Certificateless Concurrent Signcryption

カテゴリ: 研究会(論文単位)

論文No: IS11015

グループ名: 【C】電子・情報・システム部門 情報システム研究会

発行日: 2011/04/15

タイトル(英語): Efficient fair exchange with Certificateless Concurrent Signcryption

著者名: Ming Luo(Nanchang University),Chunhua Zou(Nanchang University),Jianfeng Xu(Nanchang University)

著者名(英語): Ming Luo(Nanchang University),Chunhua Zou(Nanchang University),Jianfeng Xu(Nanchang University)

キーワード: Ｃｏｎｃｕｒｒｅｎｔ　ｓｉｇｎａｔｕｒｅ|Ｓｉｇｎｃｒｙｐｔｉｏｎ|Ｃｅｒｔｉｆｉｃａｔｅｌｅｓｓ|Ｒａｎｄｏｍ　ｏｒａｃｌｅ|Concurrent signature|Signcryption|Certificateless|Random oracle

要約(日本語): Certificateless cryptography achieves the best of the two worlds: it inherits from identity-based techniques a solution to the certificate management problem in public-key encryption, whilst removing the secret key escrow functionality inherent to the identity-based setting. Concurrent signcryption, which combines the concepts of concurrent signature and signcryption together to resolve the confidentiality problem in e-commerce systems based on concurrent signature. In this paper, we construct a certificateless concurrent signcryption scheme and an efficient fair exchange protocol, and show that the proposed scheme is secure under the Diffie-Hellman assumptions in the random oracle. As compared with the recently proposed concurrent signcryption scheme, our scheme has better performance in term of the security and computation overheads.

要約(英語): Certificateless cryptography achieves the best of the two worlds: it inherits from identity-based techniques a solution to the certificate management problem in public-key encryption, whilst removing the secret key escrow functionality inherent to the identity-based setting. Concurrent signcryption, which combines the concepts of concurrent signature and signcryption together to resolve the confidentiality problem in e-commerce systems based on concurrent signature. In this paper, we construct a certificateless concurrent signcryption scheme and an efficient fair exchange protocol, and show that the proposed scheme is secure under the Diffie-Hellman assumptions in the random oracle. As compared with the recently proposed concurrent signcryption scheme, our scheme has better performance in term of the security and computation overheads.

原稿種別: 日本語

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