Abstract:
Due to the wide use of cloud services the amount of unstructured data being transferred to the
clouds is increasing exponentially. The security threats to the cloud data and probability of data
vulnerabilities is also increasing. To minimize the data hacking, misuse or unauthorized use
different data encryption techniques have been adopted by the cloud services providers and cloud
clients for the data security. With these encryption techniques the data searching becomes
difficult. The purpose of this research is to perform indexing on the unstructured data using the
original document. The technique will reduce the overhead of decryption before searches. The
preprocessed index will be encrypted which will not reveal the identity of the documents or the
words present in the document. The decryption is only needed when the relevant documents are
returned to the user.The proposed technique achieves the requirement of high security, efficiency
and accurate search. It can be used as a secure data retrieval technique by data owners and
organizations to minimize security threat and to have efficient search across the cloud server.
