Abstract:

ABSTRACT This project proposes a decentralized access control scheme aimed at securing data storage in cloud environments while ensuring anonymous authentication. Unlike traditional centralized systems, the proposed model allows the cloud to verify user authenticity without revealing the user's identity before storing data. Although the system leverages symmetric key encryption, particularly AES-256, it ensures that only authorized users can decrypt and access the stored information. The storage mechanism utilizes Amazon S3 in a decentralized manner to enhance data privacy and resilience. Periodic changes in data storage locations help mitigate replay attacks and support key operations such as data creation, modification, and retrieval. The system also effectively handles user revocation and supports a robust, decentralized authentication and access control mechanism. Compared to conventional centralized approaches, the proposed system maintains comparable levels of communication, computation, and storage overhead while offering enhanced security and scalability. Additionally, cloud costs are based on the data size, offering flexibility and cost-effectiveness when using services like Amazon S3 and Heroku.

Description:

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