This project presents a secure and privacy-preserving keyword search framework with access control for secret sharing-based data outsourcing. The system involves three primary entities: data owners, data users, and distributed servers. Data owners can register, authenticate, and upload encrypted files tagged with searchable keywords. Each uploaded file is encrypted and divided into three secret shares, which are then securely stored across three different servers to ensure data confidentiality and resilience. Data users register and log in to perform keyword-based searches on the encrypted dataset. Upon locating desired files, users submit access requests to the respective data owners. Data owners review these requests and grant or deny access based on predefined criteria. When access is approved, a secure key is generated and shared with the user, enabling them to download and reconstruct the original file only upon successful key verification. The servers facilitate file storage management by authenticating logins and providing controlled file viewing capabilities. The proposed system employs the PEKS (Public Key Encryption with Keyword Search) algorithm to enable efficient and secure keyword searches over encrypted data, ensuring data privacy and strict access control throughout the process.

Keywords:

Privacy-preserving, keyword search, access control, secret sharing, data outsourcing, PEKS algorithm, encrypted data, data owner, data user, distributed servers, secure file sharing, data confidentiality.