In today’s era of information explosion, data is being constantly created and accumulated, making it a valuable resource. Storing these large and sensitive resources securely and efficiently introduces a number of challenges. Blockchain, a decentralized digital ledger known for its tamper-proof and transparent characteristics, has great potential to improve data collection and storage. This chapter will discuss how blockchain technology can be used in data sharing and verification services. For example, it can be combined with software-defined networks (SDNs) to enable secure and intelligent data sharing in Intelligent Transport Systems (ITSs). Additionally, researchers can use a blockchain-based platform with smart contracts and batch verification to maintain scalability and the integrity of firmware updating files. Lastly, a decentralized DDoS data exchange platform over a consortium blockchain, called SOChain, can be used to address issues of trust and fairness in DDoS blacklist sharing. Overall, we believe that blockchain will play a crucial role in the current data landscape due to its secure and powerful features.