标题：Secret Key-Awareness Secure in Certificateless Cryptography
通讯作者：Zhang, GY;Zhang, G
作者机构：[Zhang, GY]Shandong Univ, Sch Comp Sci & Technol, Jinan 250100, Peoples R China.
会议名称：3rd International Conference on Environmental Science and Information Application Technology (ESIAT)
会议日期：AUG 20-21, 2011
来源：2011 3RD INTERNATIONAL CONFERENCE ON ENVIRONMENTAL SCIENCE AND INFORMATION APPLICATION TECHNOLOGY ESIAT 2011, VOL 10, PT A
关键词：Certificateless Cryptography; Malicious KGC; Strong Attack Model;; Non-Black-Box
摘要：In certificateless cryptography protocol, public keys don't be required certificates to guarantee their validity, so any other adversaries can replace users' public keys. There are two security models: the weak security model prohibits the adversaries to query the decryption oracle of the ciphertexts under the public key chosen by the adversaries, and the more strong security model is asked to correctly answer the decryption oracle of this type of ciphertexts. As we well known, almost all certificateless cryptography protocols secure in the strong model are at the cost of the efficiency. In this paper, we introduce a new definition of secret key awareness security, and we can show a protocol secure in a weak security model is also secure in the strong security model, if it satisfies secret key awareness security simultaneously. We also give a concrete certificateless scheme secure in the strong security model. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of Conference ESIAT2011 Organization Committee.