Alagarsamy Sumithra, Rajagopalan S P
Part Time Research Scholar, Department of Information and Communication Engineering, Anna University, Guindy, Chennai, Tamilnadu, India.
Department of Computer Science and Engineering, G. K. M. College of Engineering and Technology, Perungalathur, Chennai, Tamilnadu, India.
PLoS One. 2017 Oct 17;12(10):e0186207. doi: 10.1371/journal.pone.0186207. eCollection 2017.
Certificateless-based signcryption overcomes inherent shortcomings in traditional Public Key Infrastructure (PKI) and Key Escrow problem. It imparts efficient methods to design PKIs with public verifiability and cipher text authenticity with minimum dependency. As a classic primitive in public key cryptography, signcryption performs validity of cipher text without decryption by combining authentication, confidentiality, public verifiability and cipher text authenticity much more efficiently than the traditional approach. In this paper, we first define a security model for certificateless-based signcryption called, Complex Conjugate Differential Integrated Factor (CC-DIF) scheme by introducing complex conjugates through introduction of the security parameter and improving secured message distribution rate. However, both partial private key and secret value changes with respect to time. To overcome this weakness, a new certificateless-based signcryption scheme is proposed by setting the private key through Differential (Diff) Equation using an Integration Factor (DiffEIF), minimizing computational cost and communication overhead. The scheme is therefore said to be proven secure (i.e. improving the secured message distributing rate) against certificateless access control and signcryption-based scheme. In addition, compared with the three other existing schemes, the CC-DIF scheme has the least computational cost and communication overhead for secured message communication in mobile network.
基于无证书的签密克服了传统公钥基础设施（PKI）的固有缺点和密钥托管问题。它提供了高效的方法来设计具有公共可验证性和密文真实性的PKI，且依赖性最小。作为公钥密码学中的一种经典原语，签密通过将认证、保密性、公共可验证性和密文真实性相结合，比传统方法更有效地执行密文的有效性而无需解密。在本文中，我们首先通过引入安全参数并提高安全消息分发率来引入复共轭，定义了一种基于无证书签密的安全模型，称为复共轭差分积分因子（CC-DIF）方案。然而，部分私钥和秘密值都会随时间变化。为克服这一弱点，通过使用积分因子（DiffEIF）通过微分（Diff）方程设置私钥，提出了一种新的基于无证书的签密方案，从而最小化计算成本和通信开销。因此，该方案被证明是安全的（即提高了安全消息分发率），可抵御无证书访问控制和基于签密的方案。此外，与其他三种现有方案相比，CC-DIF方案在移动网络中进行安全消息通信时具有最低的计算成本和通信开销。
