针对共享型多数据拥有者场景,即一个文件被多个数据拥有者拥有,已有可搜索加密方案不能同时支持密文检索和细粒度访问控制.为此,基于线性秘密共享和可搜索加密技术提出一种高效的多数据拥有者认证的密文检索方案,数据用户只有得到多个数据拥有者的授权才能解密返回的结果.严格的安全分析表明该方案在双线性Diffie-Hellman假设下能保证安全和隐私,且基于实际数据的实验结果表明本方案在实际应用中是高效、可行的.%A sharing multi-owner setting where data was owned by a fixed number of data owners, the existing searchable encryption schemes could not support ciphertext retrieval and fine-grained access control at the same time. For this end, an efficient cryptographic primitive called as multi-owner accredited keyword search over encrypted data scheme was designed, through combining linear secret-sharing technique with searchable encryption schemes, only the data users authorized by multi-owner by could decrypt the returned results. The formal security analysis shows that the scheme can protect security and privacy under the bilinear Diffie-Hellman assumption. As a further contribution, an empirical study over real-world dataset was conelucted to show the effectiveness and practicability of the scheme.
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