<p>Secure online transactions and efficient data management remain significant challenges in the ever-changing landscape of digital transactions. In this regard, this paper proposes a new framework that incorporates blockchain for adaptive data management and secure transactions. The proposed framework enhances confidentiality and security against rising online threats and ensures real-time transaction confirmation across multiple Payment Gateways (PGs). To ensure security and efficiency in transactions and data synchronization, the system exploits blockchain’s immutability and innovative contract capabilities. The enhanced security features of the proposed system are achieved through Attribute-Based Encryption (ABE), the Sensor Chain (SC), and integration with the Cyber-Physical System (CPS) platform. The system has been appropriately validated and has achieved higher threat-detection accuracy and a lower latency. It can significantly contribute to the development of a secure e-commerce infrastructure based on next-generation blockchain technology.</p>