It would be an understatement to say that blockchain technology has garnered significant attention in the past few years. Though perhaps most popularly known in connection with cryptocurrencies like Bitcoin, blockchain has been proposed as a solution for data-related problems in several sectors including finance (Zheng et al., 2018), smart contracts (Yli-Huumo et al., 2016), and security (Biswas andMuthukkumarasamy, 2016). At the same time, blockchain has been criticized as being somewhat of a buzzword, set, like so many other technological innovations, to never live up to the hype (Yaga et al., 2018). Some have pegged blockchain as one of many technosolutionist tools that do not bring about the benefits that its proponents claim. Yet scholars, practitioners, and government officials are investigating the possibilities of blockchain to remedy some of the most pressing problems wanting a solution. Called simply, at times, a distributed ledger, blockchain is as its name specifies. It is a digital chain of blocks, each recording the transactions that have happened in the system. These blocks do not have to be centrally located, allowing multiple participants to create a federated system of recorded transactions. Interactions between parties are simplified through enhanced transparency. Blockchain systems can be either permissionless or permissioned. Permissionless systems allow anyone to join and add blocks. Permissioned systems require those wanting to participate to be allowed to join through either the consensus of the other participants, or permission from a centralized authority, such as organizational management. The kind of blockchain system created has implications for how the system is used. A question arises, however, as to whether blockchain technology should be used at all. Some scholars argue that blockchain should only be used, “when multiple mutually mistrusting entities want to interact and change the state of a system, and are not willing to agree on an online trusted third party” (Wüst and Gervais, 2018, p. 46) Otherwise, they suggest the use of a simple database or system already available. Other critics of blockchain argue that at most technology is nothing more than a hyped-up ledger system, claiming that the distributed systems are inefficient in comparison to traditional centralized systems (Yaga et al., 2018). A third criticism of implementing particularly permissionless blockchain is that privacy is limited because anyone can join (Lo et al., 2017). Critics also question the scalability of blockchain, as current systems do not have the same ability to process transactions as mainstream systems (Lo et al., 2017). Nevertheless, blockchains are being considered for various implementations in corporate, civil society, and government sectors. This special issue offers several investigations into the implications of blockchain in various civic contexts. Like industry, governments and civil society organizations have begun examining the potential for uses of blockchain technology in the administration of public services, social programs, and other municipal, and community situations. Prior to this issue, blockchains have been posited as Edited and reviewed by: Jane Thomason, University College London, United Kingdom
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