Identity-Based Proxy Signcryption Protocol with Universal Composability

• DOI: 10.1155/2018/9531784
• Publication Date: 2018-12-02T18:35:01Z
• Authors: Huifang Yu; Zhicang Wang; Jianmin Li; Xinzhe Gao
• Keywords: Signcryption; Random oracle; Delegate; Proxy (statistics)

Proxy signcryption means that the proxy signcrypter obtains delegate authorization from original and then signcrypts specified message on behalf of signcrypter. In this paper, we construct an identity-based protocol (IBPSP) based universally composable (UC) framework. random oracle model, prove has semantic security under gap bilinear Diffie-Hellman computational assumptions. At same time, ideal functionality is defined in UC framework, also equivalence between its IND-CCA2 UF-CMA security. Analysis shows IBPSP both low computation complexity together with