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[Fizinfo] Thursday 14:30 - Aleksey Fedorov on quantum-secured blockchain

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  • From: Andras Palyi <palyi AT>
  • Subject: [Fizinfo] Thursday 14:30 - Aleksey Fedorov on quantum-secured blockchain
  • Date: Tue, 16 Feb 2021 19:45:17 +0100

Dear Colleague,

The Budapest Distributed Quantum Systems seminar series starts on Feb 18
Thursday, with the following talk:

Quantum-Secured Blockchain Protocol
Aleksey Fedorov (Russian Quantum Center, Moscow)

Time: Feb 18 Thursday, 14:30
Location: online in Teams

Teams link to join the talk:

Please see the website for more details on the seminar series:

Best regards,
Andras Palyi

on behalf of the organizers
Lorant Farkas (Nokia Bell Labs, Budapest)
Andras Palyi (Budapest University of Technology and Economics)
Zoltan Zimboras (Wigner Research Centre for Physics, Budapest)

= = =

About the speaker: Dr. Aleksey Fedorov is the Junior Principal Investigator
of the research group of Quantum Information Technologies at the Russian
Quantum Center in Moscow, Russia. Aleksey studied Computer Science in Moscow,
and obtained his PhD in Physics in Paris, in 2017. Currently he and his group
studies the potential of quantum systems for information technology. Among
other results, Aleksey's group has developed a protocol for a
quantum-protected blockchain [Nature (London) 563, 465 (2018); Quantum Sci.
Technol. 3, 035004 (2018)].

Abstract: The blockchain is a distributed ledger platform with high Byzantine
fault tolerance, which enables achieving consensus in a large decentralized
network of parties who do not trust each other. A paramount feature of
blockchains is the accountability and transparency of transactions, which
makes it attractive for a variety of applications ranging from smart
contracts and finance to manufacturing and healthcare. Blockchain relies on
two one-way computational technologies: hash functions and digital
signatures. Most blockchain platforms rely on the elliptic curve public-key
cryptography or the integer factorization problem to generate a digital
signature. The security of these algorithms is based on the assumption of
computational complexity of certain mathematical problems. A universal
quantum computer would enable efficient solving of these problems, thereby
making digital signatures, including those used in blockchains, insecure. A
way to guarantee authentication in the quantum era is to use quantum key
distribution, which guarantees information-theoretic security based on the
laws of quantum physics. Quantum key distribution is able to generate a
secret key between two parties connected by a quantum channel (for
transmitting quantum states) and a public classical channel (for post
processing). We discuss a blockchain platform that is based on quantum key
distribution and review possible experimental realizations for such a

  • [Fizinfo] Thursday 14:30 - Aleksey Fedorov on quantum-secured blockchain, Andras Palyi, 02/16/2021

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