| 基于Ad hoc网的身份型广播加密方案 |
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| 引用本文： | 孙瑾,胡予濮,张乐友.基于Ad hoc网的身份型广播加密方案[J].计算机科学,2011,38(2):46-49. |
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| 作者姓名： | 孙瑾 胡予濮 张乐友 |
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| 作者单位： | 西安电子科技大学计算机网络与信息安全教育部重点实验室,西安,710071 |
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| 基金项目： | 本文受973项目(2007CB311207)，国家自然科学基金项目(60970119)资助。 |
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| 摘 要： | 考虑到动态Ad hoc网的安全性及效率难以兼顾的问题，提出一种有效的基于动态网络的广播加密方案，并给出严格的安全性证明。该方案建立在标准模型下，当用户之间通过广播方式传递信息时，采用双线性对运算对任意数量无状态用户可实现完全杭串谋攻击。在密钥提取过程中，通过引入身份随机数并利用撤销用户身份集合进行加密，使得新用户可以动态加入群却不改变加解密密钥和密文的长度，其大小不超过O(1)。同时，所有有效操作过程在O(r)时间内完成，不依赖于用户总人数二，从而大大提高了算法的传输及存储效率。安全性验证表明，该方案在GD-DHE假设下是杭静态敌手INI}IN-CPA安全的。
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| 关 键 词： | 动态Ad hoc网，可证明安全，标准模型，完全抗串谋攻击 |
Identity-based Broadcast Encryption Based on Ad hoc Networks |
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| SUN Jin,HU Yu-pu,ZHANG Le-you.Identity-based Broadcast Encryption Based on Ad hoc Networks[J].Computer Science,2011,38(2):46-49. |
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| Authors: | SUN Jin HU Yu-pu ZHANG Le-you |
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| Affiliation: | (Key Lab of Computer Network and Information Security,Xidian University,Xi'an 710071,China) |
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| Abstract: | To give concurrent consideration in the security and efficiency, a novel identity-based broadcast encryption was developed for ad hoc networks. Through security analysis, the correctness and effectiveness of the above methods were verified. Based on the standard model, the bilinear maps were introduced to achieve the collusion-secure for arbitrarily large of users during the broadcast communication. In the process of extract, new users could join dynamically without modification of user decryption keys nor ciphertext size by using ID,and its size not much than O(1). Simultancously, all efficiency measures were completed in O(r) time but not depended on the number of user m, thus the efficiency of transmission and storage was improved. Proof of security shows that the proposed scheme is IN-IN-CPA secure against static adversaries in the standard model under the (t,n)-GDDHE intractability assumption. |
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| Keywords: | Mobile Ad hoc networks Provably secure Standard model Fu11 collusion-secure |
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