This document presents a system approach for single keyword search of encrypted data files stored in the cloud. It proposes using order-preserving encryption to achieve security and efficiency. The system architecture involves a cloud owner uploading and encrypting files, storing them in the cloud storage, and a user searching for files by encrypting keywords. It aims to address security concerns with cloud storage while allowing efficient searches. Evaluation shows the approach allows authentication, file uploads and downloads, and keyword searches of encrypted files in the cloud.