基于位置密钥交换的UC安全模型

发布时间：2018-05-28 14:59

本文选题：基于位置密码学 + 密钥交换　；参考：《计算机研究与发展》2014年02期

【摘要】：基于位置密码学的目标是将参与方的物理位置信息作为唯一的凭证来实现某些密码学任务,如基于位置的加密.可证安全的基于位置密钥交换协议应满足对于任意位置的证明者,在基于位置密钥交换协议后,证明者和验证者之间能够协商一个共享密钥.并且,对于任意多个共谋敌手而言,该共享密钥与随机数是不可区分的.研究了基于位置密码学中密钥交换的可证明安全问题.在通用可组合安全框架下,提出了基于位置密钥交换的可证安全模型.根据基于位置密钥交换协议的需求,设计了基于位置密钥交换的理想函数.对于任意多个共谋敌手而言,该理想函数生成的共享密钥与随机数是不可区分的.同时,作为基于位置密码学的一种前提假设,设计了有界检索模型(bounded retrieval model,BRM)的理想函数.此外,以1-维空间的基于位置密钥交换为例,证明了该协议在BRM模型下能够实现基于位置密钥交换的理想函数.
[Abstract]:The goal of location-based cryptography is to implement some cryptographic tasks such as location-based encryption by using the physical location information of the participants as a unique credential. The provable location-based key exchange protocol should satisfy the proband of any location. After the location-based key exchange protocol, a shared key can be negotiated between the certifier and the verifier. Moreover, the shared key is indistinguishable from the random number for any number of complicit adversaries. The provable security of key exchange in location-based cryptography is studied. Under the general combinable security framework, a provable security model based on location key exchange is proposed. According to the requirement of location key exchange protocol, an ideal function based on location key exchange is designed. For any number of co-conspirators, the shared key generated by the ideal function is indistinguishable from the random number. At the same time, as a presupposition of location cryptography, the ideal function of bounded retrieval model (BRM) is designed. In addition, taking the 1-dimensional location-based key exchange as an example, it is proved that the proposed protocol can realize the ideal function of location-based key exchange under BRM model.
【作者单位】：西安电子科技大学计算机学院;
【基金】：长江学者和创新团队发展计划基金项目(IRT1078) 国家科技重大专项基金项目(2011ZX03005-002) 国家自然科学基金项目(U1135002,61100230,61100233,61202389,61202390) 陕西省自然科学基础研究计划基金项目(2011JQ8003,2012JM8030) 中央高校基本科研业务费专项基金项目(JY10000903001,K5051303003)
【分类号】：TN918.4

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