IIoT Data Sharing: CP-A$\!^{2}$2BE With Outsourced Decryption and Verifiable Revocation

This research proposes CP-A²2BE, a security system for sharing data in Industrial Internet of Things (IIoT, or connected devices in factories). The system uses ciphertext-policy attribute-based encryption (a method that encrypts data so only users with specific characteristics can decrypt it) with three improvements: faster decryption through edge computing (processing at local factory nodes instead of distant servers), privacy protection for device and worker attributes, and a verifiable revocation mechanism (a way to instantly revoke access while proving the operation is legitimate).