Some ideas proposed: • Permacoin [A. Miller, A. Juels, E. Shi, B. Parn, J. Katz, Permacoin: Repurposing Bitcoin Work for Data Preservation, 2014] • Primecoin [Sunny King, Primecoin: Cryptocurrency with Prime Number Proof-of-Work, 2013] 71. Permacoin Main idea: parametrize PoWs with a large file 𝑭 (“too large to store by individuals”). Proof-of-work (PoW) mechanisms are an integral part of modern cryptocurrencies, such as Bitcoin and the numerous altcoin variants , where they are used to maintain consensus.Despite their successful employment for this task, a source of contention for proofs-of-work is the energy wastage associated with their use [14, 16].On the other hand, the developers of Bitcoin claim that the waste of ... Bitcoin is the first successful decentralized global digital cash system. Usefulness of the mining process requiring a lot of computational resources to be wasted, though, remains disputable. Request PDF Permacoin: Repurposing Bitcoin Work for Data Preservation Bit coin is widely regarded as the first broadly successful e-cash system. An oft-cited concern, though, is that mining ... “Permacoin: Repurposing Bitcoin Work for Data Preservation“. Andrew Miller, Ari Juels, Elaine Shi, Bryan Parno, Jonathan Katz. 2014. ... “Bitcoin and the definition and functions of money“. Anna Piotrowska. 2015. ... Bitcoin Data Offers Unprecedented Insights“. Jonathan Donier, Jean-Philippe Bouchaud. 2015.
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