一种无安全信道的模糊关键字搜索加密方案

在互联网技术高度发达的今天，人们越来越习惯把个人数据上传到云端进行存储。传统可搜索公钥加密方案仅支持对精确的关键字进行搜索，用户需要精确地输入搜索关键字，且需要使用安全信道来传输陷门，降低了系统的可用性。针对安全信道，本文结合公钥加密技术提出一种无安全信道的模糊关键字搜索加密方案。该方案在不使用安全信道的情况下也能保证信息的隐私性，使用通配符技术来降低关键字集的空间大小，并且给出安全性验证。

A Fuzzy Keyword Search Encryption Scheme Without Secure Channel

Today with highly developed Internet technology, people are more and more accustomed to upload personal data to the cloud for storage. The traditional searchable public key encryption scheme only supports searching for exact keywords. Users need to input search keywords accurately and use secure channels to transmit traps, which reduces the availability of the system. For secure channel, combining with public key encryption technology, this paper propose a scheme of searching and encrypting fuzzy keywords without secure channel. This scheme can guarantee the privacy of information without using secure channel, and will use wildcard technology to reduce the space size of keyword set. The security verification is also given.