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Paper 1
Advances in Quantum-Secure Banking: Cryptographic Solutions
Timothy Olatunji Ogundola
- Year
- 2020
- Journal
- International Journal of Science and Research Archive
- DOI
- 10.30574/ijsra.2020.1.1.0048
- arXiv
- -
Quantum computers are moving so quickly that they now threaten the cryptographic tools banks rely on every day. Shorts algorithm alone puts RSA and ECC at risk, and even Grovers speed-up shortens the lifespan of most symmetric keys. Faced with these dangers, the finance industry must switch to quantum-safe schemes without delay. This study reviews the newest post-quantum options that are being built for payments, lending, and other banking functions. Drawing on NISTs standardization work, live pilots at top banks, and head-to-head tests of lattice, code, multivariate, hash, and isogeny methods, we map out practical upgrade paths. Our analysis finds that lattice packages such as CRYSTALS-Kyber and Di lithium strike the best balance of performance and maturity today, while hybrid setups and crypto-agility keep systems future-proof. We therefore urge firms to roll out new algorithms in stages, work with regulators, and share lessons across the sector so they remain secure in a quantum world.
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Necessary and sufficient state condition for two-qubit steering using two measurement settings per party and monogamy of steering
Shiladitya Mal, Debarshi Das, Souradeep Sasmal, A. S. Majumdar
- Year
- 2017
- Journal
- arXiv preprint
- DOI
- arXiv:1711.00872
- arXiv
- 1711.00872
We consider the Cavalcanti-Foster-Fuwa-Wiseman inequality~\cite{achsh} which is a necessary and sufficient steerability condition for two-qubit states with two measurement settings on each side. We derive the criterion which an arbitrary two-qubit state must satisfy in order to violate this inequality, and obtain its maximum attainable violation in quantum mechanics. The derived condition on the state parameters enables us to establish a tight monogamy relation for two-qubit steering.
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