Tabulation based 4-universal hashing with applications to second moment estimation

  • Authors:
  • Mikkel Thorup;Yin Zhang

  • Affiliations:
  • AT&T Labs---Research, Shannon Laboratory, Florham Park, NJ;AT&T Labs---Research, Shannon Laboratory, Florham Park, NJ

  • Venue:
  • SODA '04 Proceedings of the fifteenth annual ACM-SIAM symposium on Discrete algorithms
  • Year:
  • 2004

Quantified Score

Hi-index 0.01

Visualization

Abstract

We show that 4-universal hashing can be implemented efficiently using tabulated 4-universal hashing for characters, gaining a factor of 5 in speed over the fastest existing methods. We also consider generalization to k-universal hashing, and as a prime application, we consider the approximation of the second moment of a data stream.