The Construction And Application Of Efficient Public Key Encryption With Keyword Search

Searchable encryption is such a cryptographic mechanism that enables privacy preserving keyword search on encrypted data. In order to search for the encrypted data which they want, users need to get the data by searching the keyword. It compares the cipher and trapdoor of a same keyword to get the right data return. This concept has been applied on many systems, such as E-mail, cloud storage, electronic medical record. Efficiency of such searchable encryption in a medical cloud storage system is very important as it involves client platforms such as smart phones or tablets which only have constrained computing power and resources.In this paper, we propose an efficient secure-channel free public key encryption with keyword search (SCF-PEKS) scheme which has been proven secure in the standard model. We show that our SCF-PEKS scheme is not only secure against chosen keyword and ciphertext attacks (IND-SCF-CKCA), but also secure against keyword guessing attacks (IND-KGA). Furthermore, our proposed scheme is more efficient than other recent SCF-PEKS schemes in the literature.Our scheme is applied on the electronic medical records in the cloud storage. With the development of cloud computing technology, health care practitioners need to store the electronic medical record (EMRs) in the cloud storage, so you can make the medical practitioners get access to electronic medical records anywhere with an Internet connection. In order to protect the privacy of the patient’s medical record, medical practitioners may need to store encrypted data in the cloud storage.Then there should be a mechanism that allows them to search encrypted data without compromising the privacy of patients. That’s the problem what our scheme would solve.