Searchable Encryption Scheme Based On Identity In Cloud Storage

With the continuous development of cloud computing,users start to transfer the data to the cloud storage servers,to avoid tedious local data management and to get more convenient service.In order to guarantee the data security and privacy of user,the data in the form of cipher text is stored in the encrypted cloud storage server,but users how to search in the cipher text is facing a big problem.Application in order to solve this problem,a searchable encryption mechanism and allows the user to not to leak sensitive data information under the situation of keyword search.This paper mainly studied the searchable encryption mechanism based on identity in cloud storage,basically achieved the following result:(1)Constructed under a cloud storage based on the identity of the searchable encryption scheme for specified tester,improved under the Diffie-Hellman assumptions,the scbeme can prevent malicious server attack,and proves that the scheme is safe under the random oracle machine model.(2)Improved under multi-user keywords searchable encryption scheme,joined the proxy server,in the scenario uses the double encryption algorithm to encrypt,reduced the number of the private key distribution,inproved the proxy server memory utilization,reduced the calculation cost of cloud storage server.