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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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Tighter Einstein-Podolsky-Rosen steering inequality based on the sum uncertainty relation
Ananda G. Maity, Shounak Datta, A. S. Majumdar
- Year
- 2017
- Journal
- arXiv preprint
- DOI
- arXiv:1711.01401
- arXiv
- 1711.01401
We consider the uncertainty bound on the sum of variances of two incompatible observables in order to derive a corresponding steering inequality. Our steering criterion when applied to discrete variables yields the optimum steering range for two qubit Werner states in the two measurement and two outcome scenario. We further employ the derived steering relation for several classes of continuous variable systems. We show that non-Gaussian entangled states such as the photon subtracted squeezed vacuum state and the two-dimensional harmonic oscillator state furnish greater violation of the sum steering relation compared to the Reid criterion as well as the entropic steering criterion. The sum steering inequality provides a tighter steering condition to reveal the steerability of continuous variable states.
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