コマノ　ユウイチ   駒野　雄一    所属   千葉工業大学  情報変革科学部 高度応用情報科学科    千葉工業大学  情報科学研究科 情報科学専攻    職種   教授
言語種別	英語
発行・発表の年月	2007/05
形態種別	学術雑誌
査読	査読あり
標題	Provably secure untraceable electronic cash against insider attacks
執筆形態	共著
掲載誌名	IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES
掲載区分	国外
出版社・発行元	IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
巻・号・頁	E90A(5),pp.980-991
著者・共著者	Yoshikazu Hanatani,Yuichi Komano,Kazuo Ohta,Noboru Kunihiro
概要	Although a great deal of research has been done on electronic cash schemes with blind multisignatures to prevent an insider attack, there is no discussion of a formal security model in the literature. Firstly we discussed the security model of e-cash schemes based on the blind multisignature scheme against a (restricted) attack model and proposed a concrete scheme proven to be secure in the model [1]; however, this attack model disallows an attacker from corrupting an issuing bank and shops in the forgery game. In this paper, first, we reconsider the security model to remove the restriction of the attack model. Second, we propose a new untraceable e-cash scheme with a blind multisignature scheme and prove that the proposed scheme is secure against the (non-restricted) attacks under the DDH assumption in the random oracle model.
DOI	10.1093/ietfec/e90-a.5.980
ISSN	1745-1337
PermalinkURL	http://dblp.uni-trier.de/db/journals/ieicet/ieicet90a.html#journals/ieicet/HanataniKOK07