Cryptology ePrint Archive: Report 2019/735

SoK of Used Cryptography in Blockchain

Mayank Raikwar and Danilo Gligoroski and Katina Kralevska

Abstract: The underlying fundaments of blockchain are cryptography and cryptographic concepts that provide reliable and secure decentralized solutions. Although many recent papers study the use-cases of blockchain in different industrial areas, such as finance, health care, legal relations, IoT, information security, and consensus building systems, only few studies scrutinize the cryptographic concepts used in blockchain. To the best of our knowledge, there is no Systematization of Knowledge (SoK) that gives a complete picture of the existing cryptographic concepts which have been deployed or have the potential to be deployed in blockchain. In this paper, we thoroughly review and systematize all cryptographic concepts which are already used in blockchain. Additionally, we give a list of cryptographic concepts which have not yet been applied but have big potentials to improve the current blockchain solutions. We also include possible instantiations of these cryptographic concepts in the blockchain domain. Last but not least, we explicitly postulate 21 challenging problems that cryptographers interested in blockchain can work on.

Category / Keywords: cryptographic protocols / Blockchain, consensus, hash function, signature, encryption, zero-knowledge proofs, access control, accumulator

Original Publication (in the same form): IEEE ACCESS

Date: received 20 Jun 2019, last revised 31 Jan 2020

Contact author: mayank raikwar at ntnu no, danilog at ntnu no, katinak at ntnu no

Available format(s): PDF | BibTeX Citation

Version: 20200131:115230 (All versions of this report)

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