高效安全的无证书聚合签密方案-《计算机技术与发展》

文章信息/Info

Author(s):: LI Chen; QI Zheng-hua; School of Computer Science and Technology,School of Software,Nanjing University of Posts and Telecommunications,Nanjing 210003,China

Keywords:: aggregate signcryption; certificateless; no-bilinear pairing; random oracle model; discrete logarithm problem

摘要:: 无证书聚合签密是多个加密方分别签密不同的消息然后聚合成一个签密进行传输,保证安全性的同时提高了传输和验证的效率,并且采用了低繁琐度、无密钥托管问题的无证书方式。在物联网蓬勃发展的今天,聚合签密具有可观的应用场景。以往的聚合签密方案需要多次群内双线性运算和指数运算,计算效率较低。对无证书签密方案进行了研究,在不降低签密算法的复杂性和混乱性的前提下,聚合并优化了前人的无证书签密方案,提出了一种安全高效的无证书无双线性对运算的聚合签密方案,分析了随机预言模型下的安全性和效率。理论分析表明,此方案避免了密钥的线性化,在所需的应用场景下,强抗碰撞性的 Hash 函数条件下,具有机密性和不可伪造性,并且具有更高的计算效率。

Abstract:: Certificateless aggregate signcryption is that multiple encryptors signcrypt different messages and then aggregate them into a signcryption for transmission,improving the efficiency of transmission and verification securely,and adopt a certificateless method with low complexity and no key escrow. Today,with the rapid development of the IoT,aggregate signcryption has considerable application scenarios. The previous aggregation signcryption schemes required multiple bilinear operations in the group and exponential operations,which leads to the low calculation efficiency.? ?For this reason,aggregating and optimizing the previous certificateless signcryption schemes without reducing the complexity and chaos of the signcryption algorithm, we propose a secure and efficient aggregated signcryption scheme without certificate and bilinear pairing operation, and analyze the security and efficiency with the random oracle model. Theoretical analysis shows that the proposed scheme avoids linearization of the key. Under the required application scenarios and Hash function with strong collision resistance,this scheme is confidential and unforgeable,and has higher computing efficiency.