Efficient Certificateless Signcryption Scheme with Public Verifiability
Weiyi Cai · Jisuanji gongcheng · 2011
According to the safety certificateless signcryption model,this paper presents an efficient certificateless signcryption scheme with public verifiability based on bilinear pairing.There are four participants which are Key Generation Center(KGC),signcryptioner,designcryptioner and verifier.In order to improve the trust level of this cryptosystem,binding technique is adopted and the user's secret value and public key is generated before KGC extracting the partial private key.The public verification only needs the message and ciphertext to validation party.Analysis result shows that the scheme enjoys desirable properties of confidentiality and existential unforgeability,computational cost is lower,and it is easy to realize.