Less Hashing, Same Performance: Building a Better Bloom Filter

A standard technique from the hashing literature is to use two hash functions h1(x) and h2(x) to simulate additional hash functions of the form gi(x) = h1(x) + ih2(x). We demonstrate that this technique can be usefully applied to Bloom filters and related data structures. Specifically, only two hash functions are necessary to effectively implement a Bloom filter without any loss in the asymptotic false positive probability. This leads to less computation and potentially less need for randomness in practice.

• Type: Conference
• Year: 2006
• Where: ESA
• Authors: Adam Kirsch, Michael Mitzenmacher
• Keywords: Additional Hash Functions, Algorithms, Bloom Filter, ESA 2006, Hash Functions