An Efficient Proxy Signcryption Scheme without Random Oracle
Signcryption is a new cryptographic primitive which simultaneously provides both confidentiality and authenticity. However, most of the existing signcrytion schemes are only proven in the random oracle model. A system that is proven secure using such a proof is described as being secure in the random oracle model may be insecure in the standard model. In the paper, we present a novel proxy signcryption scheme without random oracle by combining proxy signature scheme with signcryiton technique. And the scheme is proven to be secure in the standard model. The security of the scheme is closely related to the security of BBS04s short signature.
random oracle -the SDH problem short signature proxy signcryption unforgeobility
Jianhong Zhang Hua Chen
College of Sciences North China University of Technology Beijing, China
国际会议
海口
英文
145-149
2011-02-22（万方平台首次上网日期，不代表论文的发表时间）