Establishing blockchain policy Strategies for the governance of distributed ledger technology ecosystems
rapid expansion and the number of projects has become so great, that it is a challenge to list them all. The technologies that are listed are meant to be a high level survey, but so many are named in the sections that follow that a ‘definitions’ section might easily exceed the length of the rest of this paper. We therefore encourage the reader to explore each one on their own and
independently evaluate, which approach applies best to their specific needs. The only definition that we would like to make in this paper is that of blockchains and of distributed ledgers, as we use both terms with slightly different meaning.
Blockchains were the first technological structures to solve the double spend problem and they rely on a massively replicated ledger that is appended by adding transactions in blocks. Each block is cryptographically linked to the previous block with the use of a cryptographic primitive called secure hash. Distributed Ledger Technology (DLT) is the more general category of solutions that aims to order transactions, but may not use a linked chain of blocks to achieve its goal. Examples of distributed ledgers include Directed Acyclic Graphs (DAGs) and some approaches that aren’t clearly structured as replicated chains of blocks but implement a shared transaction order nonetheless.
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