基于椭圆曲线的ElGamal型位置隐私保护方案 |
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作者姓名: | 赖慧彬 许力 曾雅丽 朱瑞 |
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作者单位: | 1. 福建师范大学数学与信息学院,福建 福州 350007;2. 福建省网络安全与密码技术重点实验室,福建 福州350007 |
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基金项目: | 国家自然科学基金(61771140);国家自然科学基金(U1905211);福建省科技厅高校产学研项目(2017H6005);企事业合作项目(DH-1307);企事业合作项目(DH-1412) |
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摘 要: | 针对协作频谱感知场景下次用户的位置隐私问题,提出一种基于椭圆曲线的ElGamal型位置隐私保护方案。首先,次用户通过椭圆曲线上的ElGamal公钥密码体制加密原始感知报告后发送给可信第三方;其次,可信第三方对加密后的感知报告进行第一次解密,并且混淆后,发送给融合中心;再次,融合中心进行第二次解密操作后得到原始感知报告;最后,分析该方案的安全性。该方案使感知报告的加密方式基于椭圆曲线上的公钥密码体制,并使可信第三方对感知报告进行混淆,实现了次用户位置隐私的保护。同时,与其他方案相比,该方案有效地降低了通信开销和存储开销。此外,该方案具有容错机制和动态机制,增强了方案的实用性。
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关 键 词: | 位置隐私保护 椭圆曲线 ElGamal 协作频谱感知 |
Elliptic curve ElGamal encryption based location privacy-preserving scheme |
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Authors: | Huibin LAI Li XU Yali ZENG Rui ZHU |
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Affiliation: | 1. College of Mathematics and Informatics,Fujian Normal University,Fuzhou 350007,China;2. Fujian Provincial Key Laboratory of Network Security and Cryptology,Fuzhou 350007,China |
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Abstract: | An elliptic curve ElGamal encryption based location privacy-preserving scheme was proposed to address the location privacy problem of secondary users in collaborative spectrum sensing.Firstly,secondary users encrypted the original sensing reports using the ElGamal public key techniques on the elliptic curve and sent them to the trusted property authority.Secondly,the trusted property authority partially decrypted and randomized sensing reports and then sent the randomized sensing reports to the fusion center.Thirdly,the fusion center finally decrypted and got the original sensing reports.Finally,security of the scheme was analyzed.According to the scheme,the encryption method of sensing reports was based on public key cryptography on elliptic curve.And the trusted property authority randomized encrypted sensing reports.Thus the location privacy of secondary users can be protected.Meanwhile,this scheme effectively reduces communication and storage cost,compared with other schemes.In addition,this scheme also has fault tolerant and dynamic mechanism,which increases the practicability and feasibility. |
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Keywords: | location privacy protection elliptic curve ElGamal collaborative spectrum sensing |
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