Attribute-Based Encryption Scheme for Secure and Efficient Access in Blockchain

Due to the large volume of sharing and storage of sensitive information on centralized or distributed storage, there is a growing necessity for employing encryption techniques that provide promising security and access control to the sensitive data on these platforms. Access control is a fundamental aspect of information security, encompassing the mechanisms and policies governing who can access, modify, or use the data within a system. Attribute-based encryption (ABE) is a cryptographic technique that offers a fine-grained access control mechanism by associating attributes with encrypted data and secret keys. This paper suggests the proposed attribute-based encryption as a means to establish secure access control in Blockchain, thereby attaining the secrecy and freshness aspects of cryptographic protocols. The proposed scheme is simulated on SPAN AVISPA. The Security Protocol Animator SPAN functions by simulating an active intruder, enabling interactive identification and construction of potential attacks against various protocols.