selective opening chosen ciphertext security directly from the ddh assumption

ISCAS OpenIR

	selective opening chosen ciphertext security directly from the ddh assumption
	Liu Shengli; Zhang Fangguo; Chen Kefei
	2012
会议名称	6th International Conference on Network and System Security, NSS 2012
会议录名称	Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
页码	100-112
会议日期	November 21, 2012 - November 23, 2012
会议地点	Wuyishan, Fujian, China
收录类别	EI
ISSN	0302-9743
ISBN	9783642346002
部门归属	(1) Dept. of Computer Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China; (2) School of Information Science and Technology Sun Yat-sen University Guangzhou 510006 China; (3) State Key Laboratory of Information Security Institute of Software Chinese Academy of Sciences China; (4) Shanghai Key Laboratory of Scalable Computing and Systems Shanghai China
摘要	Chosen-ciphertext security has been well-accepted as a standard security notion for public key encryption. But in a multi-user surrounding, it may not be sufficient, since the adversary may corrupt some users to get the random coins as well as the plaintexts used to generate ciphertexts. The attack is named "selective opening attack". We study how to achieve full-fledged chosen-ciphertext security in selective opening setting directly from the DDH assumption. Our construction is free of chameleon hashing, since tags are created for encryptions in a flexible way to serve the security proof. © 2012 Springer-Verlag.; Chosen-ciphertext security has been well-accepted as a standard security notion for public key encryption. But in a multi-user surrounding, it may not be sufficient, since the adversary may corrupt some users to get the random coins as well as the plaintexts used to generate ciphertexts. The attack is named "selective opening attack". We study how to achieve full-fledged chosen-ciphertext security in selective opening setting directly from the DDH assumption. Our construction is free of chameleon hashing, since tags are created for encryptions in a flexible way to serve the security proof. © 2012 Springer-Verlag.
关键词	Public Key Cryptography
语种	英语
内容类型	会议论文
URI标识	http://ir.iscas.ac.cn/handle/311060/15849
专题	中国科学院软件研究所
推荐引用方式 GB/T 7714	Liu Shengli,Zhang Fangguo,Chen Kefei. selective opening chosen ciphertext security directly from the ddh assumption[C],2012:100-112.