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Blockchains in the Quantum Era
Blockchains in the Quantum Era

Blockchains in the Quantum Era

Release Date: 02/05/2021

Working Group: Quantum-safe Security

Digital Ledger Technologies (DLT) such as blockchain are being deployed as part of diverse applications that span multiple market segments. Application developers have successfully leveraged the blockchain characteristics of decentralization, immutability, cryptographic security and transparency to create the solution benefits of redundancy, non-repudiation and enhanced auditing/compliance. Blockchain infrastructures make very extensive use of digital signature algorithms, hashing algorithms and public-key cryptography. The rapid pace of progress that is being experienced with quantum computing technology has made the prospect of quantum computer cyber-attacks a very real possibility.

Initiatives are therefore underway to augment today’s DLT/blockchain infrastructures with cryptographic algorithms that are highly resistant to quantum computer attack. These post-quantum algorithms are based on computational problems that are known to be very difficult for quantum computers to solve by using either Shor’s algorithm or Grover’s algorithm. This paper provides an introduction to DLT/blockchain technology, some of its representative applications, and an overview of the leading post-quantum algorithm candidates that are actively being pursued.

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Acknowledgements

Bruno Huttner Headshot
Bruno Huttner
Bruno Huttner

Bruno has co-chaired CSA’s Quantum-Safe Security working group, which was formed to address key generation and transmission methods and help the industry understand quantum‐safe methods for protecting their networks and their data, for approximately six years. As such, he has participated in writing most of the group’s research papers and has given several presentations about the group’s work. Bruno joined ID Quantique in 2014, where he’s r...

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Ashish Mehta Headshot
Ashish Mehta
Ashish Mehta

Director at Genese Incubation Management Services Pvt, Ltd

Ashish is co-chair of the CSA Blockchain/Distributed Ledger working group, where he leads and supports the group’s peer-reviewed research papers and coordinates educational and networking webinars with various industry players for the wider CSA community and industry participants. He has represented CSA as a speaker at multiple global events and is he...

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