Signcryption Scheme Based on Paillier's Public-key Cryptosystem
Yue Ze-lu · Journal of Chinese Computer Systems · 2013
Signcryption can realize encryption and signature at the same time. And its computational complexity is easier than the traditional secure schemes that fulfill the functions both. This paper proposals a signcryption schemes based on Paillier's public-key cryptosystem w ithout increasing the computational complexity and the length of the ciphertext. The details of the signcryption scheme are included in the paper. The paper defines the secure model and proves the security of the schemes under the random oracle model. The paper also analyses the efficiency through comparing w ith several typical schemes. The data table show s the improvement of the scheme. The consequence of the analysis indicates that the schemes have confidentiality,existential unforgeability and non-repudiation. And the schemes have relatively higher efficiency.