Cited by 421Quantum Computing Algorithms and ArchitectureQuantum Information and CryptographyCryptography and Residue Arithmetic

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Shor's discrete logarithm quantum algorithm for elliptic curves

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Proos, J., Zalka, Ch.·2003·Quantum Information and Computation

Abstract

We show in some detail how to implement Shor's efficient quantum algorithm for discrete logarithms for the particular case of elliptic curve groups. It turns out that for this problem a smaller quantum computer can solve problems further beyond current computing than for integer factorisation. A 160 bit elliptic curve cryptographic key could be broken on a quantum computer using around 1000 qubits while factoring the security-wise equivalent 1024 bit RSA modulus would require about 2000 qubits. In this paper we only consider elliptic curves over GF(p) and not yet the equally important ones over GF(2^n) or other finite fields. The main technical difficulty is to implement Euclid's gcd algorithm to compute multiplicative inverses modulo p. As the runtime of Euclid's algorithm depends on the input, one difficulty encountered is the ``quantum halting problem''.

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Cites

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Metadata

Authors
Proos, J., & Zalka, C.
Affiliations
University of Waterloo (CA)
Venue
Quantum Information and Computation
Publisher
Rinton Press
Published
2003-07
Volume
3
Issue
4
Pages
317-344
ISSN
1533-7146 (ISSN-L)
OpenAlex
W2135205181
Cited by
421
References
3
Citations by year
2026: 41 · 2025: 46 · 2024: 46 · 2023: 37 · 2022: 32 · 2021: 31 · 2020: 52 · 2019: 24 · 2018: 20 · 2017: 8 · 2016: 18 · 2015: 5 · 2014: 8 · 2013: 5 · 2012: 7
FWCI
2.78
Type
journal article
Language
en
Open access
Locations
  • Quantum Information and Computation (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
  • arXiv (Cornell University)
  • Quantum Information and Computation
Funders
Mitacs
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Computing Algorithms and Architecture
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Information and Cryptography
  • Physical Sciences › Computer Science › Information Systems › Cryptography and Residue Arithmetic
Keywords
Shor's algorithm, discrete logarithm problem, elliptic curve groups, quantum computing, elliptic curve cryptography, qubit requirements, integer factorization, Euclidean algorithm, modular inverse

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