Blockchain in tactical networks is super slow.
Suhyeon Lee 22, B.S. degree in cyber defense from Korea University; and Seungjoo Kim, B.S., M.S., and Ph.D. degrees in information engineering from Sungkyunkwan University, 1/07/2022, “Blockchain as a Cyber Defense: Opportunities, Applications, and Challenges,” https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=9654201/bmo [MSDI-JE-wk1]
Resource shortages, including computing power, storage, and bandwidth, is a significant challenge in a tactical network. Nevertheless, blockchain structure needs redundant resources. To store every single state which produces strong int egrity, a blockchain takes up several times the storage space of a typical storage format. In a decentralized consensus, nodes need to confirm the majority of the other nodes, and this can require, for example, in PBFT, O(n 2 ) communications. Also, a previous work [97] pointed out that it is one of the issues for a blockchain-based adaptive resilient cyberdefense system.
Several studies provide blockchain performance evaluation data. Comparative testing on the performance of a blockchain and a database was systemically performed by Chen et al. [98]. Their study compared the performance of a private blockchain using Ethereum with 6 nodes and MySQL, which is a relational database. A part of the analysis is shown in Table 5. Even though the maximum data size in a transaction can be undoubtedly advanced, performance differences in throughput and execution time are substantial. The private blockchain using Ethereum is more than 1,000 times slower than MySQL.