| 摘要: |
| 身份混合签密能够高效封装对称密钥和安全传输数据.针对现有身份混合签密方案计算复杂度高的问题,集成身份混合签密和椭圆曲线密码学(ECC)中的双线性映射,构造了一种使用ECC的身份混合签密方案.证明了所构造的方案在随机预言模型下满足co-BDH假设下的保密性和co-CDH假设下的不可伪造性.由于该方案通信成本低且计算效率高,因而能够更好地满足密码学应用需求. |
| 关键词: 身份密码学 混合签密 预言机重放技术 co-BDH 假设 co-CDH 假设 |
| DOI：10.13328/j.cnki.jos.004819 |
| 分类号: |
| 基金项目:国家自然科学基金(61363080,61272436,61572303);教育部春晖计划合作科研项目(Z2012094);中国科学院信息工程研究所信息安全国家重点实验室开放课题(2015-MS-10);保密通信重点实验室基金(9140C110206140C11050) |
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| Identity-Based Hybrid Signcryption Scheme Using ECC |
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YU Hui-Fang1,2, YANG Bo1
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1.School of Computer Science, Shaanxi Normal University, Xi'an 710062, China;2.School of Computer, Qinghai Normal University, Xining 810008, China
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| Abstract: |
| Identity-Based hybrid signcryption can efficiently encapsulate symmetric key and securely transmit data. Aiming at high computational complexity problem that exists in the existing identity-based hybrid signcryption schemes, this article integrates identity-based hybrid signcryption and bilinear maps in elliptic curve cryptography(ECC), and constructs a novel identity-based hybrid signcryption(IBHS) scheme using ECC. In the random oracle model, the paper proves that the constructed scheme satisfies the confidentiality under the co-bilinear Diffie-Hellman assumption and unforgeability under the co-computational Diffie-Hellman assumption. Since this scheme has low communication cost and high computational efficiency, it can be more practical in cryptography. |
| Key words: identity-based cryptography hybrid signcryption oracle replay technique co-bilinear Diffie-Hellman assumption co-computational Diffie-Hellman assumption |
