Identity-based Multi-PKG Generalized Signcryption Scheme
Yiliang Han · Journal of Chinese Computer Systems · 2013
An identity-based multi-PKG generalized signcryption scheme is proposed by using the bilinear pairings.It allows users in different PKG having different domain parameters to encrypt,sign or signcrypt messages w ith each other,each PKG cannot securely communicate before can securely communicate now,and pushing the identity-based cryptosystems a step forw ard in practical terms.The confidentiality of the scheme is proved in(random oracle model) ROM under GBDH assumption and unforgeability of the scheme is proved in ROM under GDH' assumption.Meanw hile,the scheme satisfies non-repudiation,forw ard security and public verification.Finally,the efficiency of the scheme is analyzed,w hich show s it is of high efficiency.