Finding a small root of a bivariate integer equation; factoring with high bits known

  • Authors:
  • Don Coppersmith

  • Affiliations:
  • IBM Research, T.J. Watson Research Center, Yorktown Heights, NY

  • Venue:
  • EUROCRYPT'96 Proceedings of the 15th annual international conference on Theory and application of cryptographic techniques
  • Year:
  • 1996

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Abstract

We present a method to solve integer polynomial equations in two variables, provided that the solution is suitably bounded. As an application, we show how to find the factors of N = PQ if we are given the high order ((1/4) log2 N) bits of P. This compares with Rivest and Shamit's requirement of ((1/3) log2 N) bits.