# Resource Management and Secure Data Exchange for Mobile Sensors Using Ethereum Blockchain
## 1 Introduction
Sending and receiving blockchain transactions, maintaining synchronization with the blockchain, and propagating blocks across the network consume valuable bandwidth that may be scarce in WSNs. (iv) Storing and managing the entire Ethereum blockchain ledger on resource-constrained sensor nodes is not feasible owing to limited storage capacity. As the Ethereum blockchain size increases, maintaining a synchronized copy of the ledger becomes challenging for the sensor nodes with constrained storage resources. (v) Integrating sensor nodes with the Ethereum blockchain raises security concerns, including vulnerabilities in smart contracts, potential attacks on sensor node communication, and risks associated with private key management. Therefore, ensuring the security and integrity of data and transactions transmitted between sensor nodes and the blockchain is essential; however, this is challenging in resource-constrained environments. Addressing these issues requires innovative solutions that balance blockchain technology's benefits with the sensor nodes' resource limitations. This may involve offloading blockchain-related tasks to more powerful edge devices or cloud servers, optimizing blockchain protocols for resource-constrained environments, and implementing lightweight consensus mechanisms tailored to the requirements of WSNs. Although different variants of studies associated with improving blockchain operations exist, it is noted that they are either more inclined towards larger-scale operations such as IoT or are more concerned with security. Therefore, the current state of blockchain in sensors requires greater emphasis on resource management. Therefore, the issues mentioned earlier are addressed in the proposed study by introducing a simplified and novel computational model for efficient resource management and seamless communication among mobile sensors. The highlighted contributions of the proposed research that differentiate itself from existing systems are as follows:  
* A simplified and novel computational framework has been presented for efficient resource management while facilitating seamless communication among mobile sensors. * This paper presents a novel validation mechanism supported by the unique enrollment of the identity of nodes with a distinct generation process of secret keys for securing internal communications among the nodes. * An Ethereum blockchain has been used to further strengthen the validation process by presenting a distributed consensus method, whereas hashing and incognito coefficients have been used for privacy preservation. * A novel trust computation mechanism has been presented that enables nodes to estimate trust under all dynamic scenarios of sensor nodes. * The proposed system has introduced a novel cost modeling that estimates cost and enhances user experience. The structure of this paper is as follows: Section 2 presents an elaborate discussion of the existing literature, and a discussion of the identified research problem is given in Section 3. A discussion of the adopted research methodologies for addressing the issues identified is presented in Section 4, while Section 5 presents a vivid debate on the accomplished result. Finally, Section 6 presents a conclusive summary of the study's contributions.