Close values of shifted modular inversions and the decisional modular inversion hidden number problem

Igor E.  Shparlinski

doi:10.3934/amc.2015.9.169

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2015, Volume 9, Issue 2: 169-176. Doi: 10.3934/amc.2015.9.169

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Close values of shifted modular inversions and the decisional modular inversion hidden number problem

Igor E. Shparlinski^1,

1.
Department of Pure Mathematics, University of New South Wales, Sydney, NSW 2052

Received: September 2013

Published: May 2015

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Abstract

We give deterministic polynomial time algorithms for two different decision version the modular inversion hidden number problem introduced by D. Boneh, S. Halevi and N. A. Howgrave-Graham in 2001. For example, for one of our algorithms we need to be given about $1/2$ of the bits of each inversion, while for the computational version the best known algorithm requires about $2/3$ of the bits and is probabilistic.

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Mathematics Subject Classification: Primary: 11T71; Secondary: 11D85, 94A60.

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