前向安全的多用户多关键词可搜索加密方案

Forward secure multi-user multi-keyword searchable encryption scheme

通过分析现有的动态可搜索加密方案,针对多用户动态可搜索加密方案不支持多关键词搜索和存在搜索效率不佳等问题,提出一种满足前向安全的多用户多关键词可搜索加密方案。使用布隆过滤器得到多关键词的检索文件,利用双线性的性质实现多用户的访问控制,检索结果更佳;搜索陷门由代理服务器和授权用户共同实现,保证陷门的安全;根据关键词状态信息和状态的单向访问索引结构,实现前向安全。通过可证明安全分析了方案的安全性。

Comprehensive analysis of existing dynamic searchable encryption schemes was carried out,for multi-user dynamic searchable encryption schemes that do not support multi-keyword search and poor search efficiency,Bloom filters were combined to construct a multi-user that satisfied forward security multiple-keywords search for encryption schemes.Bloom filters were used to obtain multi-keyword search files,and bilinear properties were used to achieve multi-user access control,and the search results were better.The search trapdoor was implemented by the proxy server and authorized users to ensure the safety of the trapdoor.According to the keyword status information and the one-way access index structure of the status,forward security was realized.The security of this program was analyzed through provable security.