当前,基于身份的数字签名体制研究取得丰硕的成果,利用双线性映射的GDH(Gap D iffie-Hellman)问题,人们提出了许多可证安全的基于身份密码体制。提供了一种直接利用现有的基于身份的数字签名体制,构造基于身份代理签名体制的途径,并利...当前,基于身份的数字签名体制研究取得丰硕的成果,利用双线性映射的GDH(Gap D iffie-Hellman)问题,人们提出了许多可证安全的基于身份密码体制。提供了一种直接利用现有的基于身份的数字签名体制,构造基于身份代理签名体制的途径,并利用可证安全理论,在标准计算模型下给出了严格的安全性证明。展开更多
In an open network environment, the protection of group communication is a crucial problem. In this article, a novel broadcast group-oriented signcryption scheme is presented for group communication scenarios in distr...In an open network environment, the protection of group communication is a crucial problem. In this article, a novel broadcast group-oriented signcryption scheme is presented for group communication scenarios in distributed networks, Anyone in this scheme can signcrypt a message and distribute it to a designated group, and any member in the receiving group can unsigncrypt the ciphertext. The ciphertext and public key in the scheme are of constant size. In addition, this new scheme offers public verification of the ciphertext. This property is very important to the large-scale group communication since the gateway can filter the incorrect ciphertext and alleviate the receiver＇s workload. Finally, a proof in the random oracle model is given to show that the scheme is secure against chosen ciphertext attack and existential forgery.展开更多
文摘当前,基于身份的数字签名体制研究取得丰硕的成果,利用双线性映射的GDH(Gap D iffie-Hellman)问题,人们提出了许多可证安全的基于身份密码体制。提供了一种直接利用现有的基于身份的数字签名体制,构造基于身份代理签名体制的途径,并利用可证安全理论,在标准计算模型下给出了严格的安全性证明。
文摘In an open network environment, the protection of group communication is a crucial problem. In this article, a novel broadcast group-oriented signcryption scheme is presented for group communication scenarios in distributed networks, Anyone in this scheme can signcrypt a message and distribute it to a designated group, and any member in the receiving group can unsigncrypt the ciphertext. The ciphertext and public key in the scheme are of constant size. In addition, this new scheme offers public verification of the ciphertext. This property is very important to the large-scale group communication since the gateway can filter the incorrect ciphertext and alleviate the receiver＇s workload. Finally, a proof in the random oracle model is given to show that the scheme is secure against chosen ciphertext attack and existential forgery.
