Blockchain-based CP-ABE System Using ECC for Cloud Storage

Cloud storage has revolutionized data storage and access, offering a convenient and scalable solution for storing large amounts of data. However, it also raises issues related to security and privacy, especially after storing the sensitive information on remote servers. In this context, attribute-based encryption (ABE) has added substantial consideration by means of a solution to enforce precise access control on encrypted information. A notable form of ABE is Ciphertext-Policy Attribute-Based Encryption (CP-ABE), allowing the data owner to state access rules depends on attributes (such as roles, permissions, or other user-specific factors). The application of Elliptic Curve Cryptography (ECC) in CP-ABE enhances the system’s efficiency and security. On top of this, integrating blockchain technology can provide decentralized and immutable record-keeping, which enhances the transparency, trust, and integrity of the encryption and decryption processes. A Blockchain-based CP-ABE system using ECC provides a robust, secure, and decentralized solution for managing access control to encrypted cloud storage. The integration of blockchain ensures transparency, immutability, and auditability, while ECC offers significant security with lower computational burden. By combining these technologies, we can build an effective and safe framework for protecting sensitive information in cloud environments, ensuring that access to and decryption of the information is restricted to authorized users only based on well-defined access policies.