Conference Paper

On Immutability of Blockchains

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Date

2018

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European Society for Socially Embedded Technologies (EUSSET)

Abstract

Recently we presented a single-party cryptographic timestamping mechanism based on proof-of-sequential-work, which we proved secure in the universal composability framework [16]. This paper describes this construction and its security claims and uses it to construct a multi-party permissioned blockchain protocol and show that it achieves an immutability notion. Finally we discuss applications of this protocol, including unpermissioned blockchains, and how these may benefit.

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Landerreche, Esteban; Stevens, Marc (2018): On Immutability of Blockchains. Proceedings of 1st ERCIM Blockchain Workshop 2018. DOI: 10.18420/blockchain2018_04. European Society for Socially Embedded Technologies (EUSSET). PISSN: 2510-2591. Amsterdam, Netherlands. 8 - 9 May 2018

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