CAJ | 학술논문

云存储服务允许用户外包数据并以此来降低资源开销。针对云服务器不被完全信任的现状，文章研究如何在云环境下对数据进行安全存储和加密搜索。多用户的可搜索加密方案为用户提供了一种保密机制，使用户可以在不受信任的云存储环境下安全地共享信息。在现有的可搜索加密方案的基础上，文章提出了一种安全有效的带关键字搜索的加密方案，以及更加灵活的密钥管理机制，降低了云端数据处理的开销。
운존저복무윤허용호외포수거병이차래강저자원개소。침대운복무기불피완전신임적현상，문장연구여하재운배경하대수거진행안전존저화가밀수색。다용호적가수색가밀방안위용호제공료일충보밀궤제，사용호가이재불수신임적운존저배경하안전지공향신식。재현유적가수색가밀방안적기출상，문장제출료일충안전유효적대관건자수색적가밀방안，이급경가령활적밀약관리궤제，강저료운단수거처리적개소。
Cloud storage services allow the users to outsource their data to the cloud storage servers to reduce management costs. The cloud servers cannot be fully trusted while those data may contain sensitive personal information. We study a problem of storing and retrieving private data encrypted in a cloud. Multi-user searchable encryption is a promising way to keep user’s data conifdential against un-trusted cloud service provider and allow users to share their data in privacy. In this paper we propose an efficient, secure and privacy preserving keyword search scheme which supports multiple users with more lfexible key management and lower computation cost rather than known approaches.