Blockchains from Non-Idealized Hash Functions
Juan A. Garay, Aggelos Kiayias, Giorgos Panagiotakos · IACR Cryptology ePrint Archive · 2019
The formalization of concrete, non-idealized hash function properties sufficient to prove the security of Bitcoin and related protocols has been elusive, as all previous security analyses of blockchain protocols have been performed in the random oracle model. In this paper we identify three such properties, and then construct a blockchain protocol whose security can be reduced to them in the standard model assuming a common reference string (CRS).