Variants and Extensions of Bloom Filters

Here are a few variants and extensions of Bloom filters:

1. Counting Bloom Filters

Counting Bloom filters extend the standard Bloom filter by using an array of counters instead of a simple bit array. This modification allows for the deletion of elements from the filter, as each counter can be incremented or decremented when elements are added or removed, respectively. However, this added functionality comes at the cost of increased storage space and complexity.