• Mrs. Shivam Patkar
• Rajneesh Pachouri
• Mr. Anurag Jain

This study presents a Dual-Server Public-Key Authenticated Encryption with Keyword Search (DPAEKS) system designed to provide secure and efficient retrieval of sensitive data stored in cloud environments. The proposed model addresses the limitations of traditional public-key encryption with keyword search (PEKS) schemes, which are vulnerable to inside keyword guessing attacks and often lack strong user authentication and practical performance. Building on recent advances in authenticated searchable encryption and dual-server architectures, the scheme introduces two non-colluding servers—Assistant Server and Test Server—that cooperatively execute the keyword search Test operation, ensuring that neither server alone can complete the search or infer the queried keyword. Data owners encrypt documents and generate authenticated keyword cipher texts using their own keys, the public keys of both servers, and a shared key with authorized data receivers, while data receivers generate authenticated trapdoors for their search queries. The dual-server design with intermediate cipher texts enhances resistance to inside keyword guessing attacks, enforces strict access control, and maintains privacy of user interests. Experimental evaluation comparing the proposed DPAEKS system with traditional PEKS and single-server PAEKS shows reduced encryption, trapdoor generation, and search times, with only a moderate increase in communication overhead due to server cooperation. These results demonstrate that the proposed DPAEKS scheme offers a practical and robust solution for privacy-preserving keyword search over encrypted cloud data, achieving a favorable balance between strong security guarantees and real-world efficiency.

Dual-server architecture, public-key authenticated encryption, keyword search, searchable encryption, cloud data security, inside keyword guessing attack

"Efficient Dual-Server Public-Key Authenticated Encryption with Keyword Search for Privacy-Preserving Cloud Storage", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.13, Issue 1, page no.c450-c457, January-2026, Available :http://www.jetir.org/papers/JETIR2601254.pdf

"Efficient Dual-Server Public-Key Authenticated Encryption with Keyword Search for Privacy-Preserving Cloud Storage", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.13, Issue 1, page no. ppc450-c457, January-2026, Available at : http://www.jetir.org/papers/JETIR2601254.pdf