In a method of performing discovery, at least a plurality of identifiers associated with a plurality of respective communication devices is processed, using a first hash function, to generate a first bit string. The first bit string is indicative of whether each of the plurality of identifiers is included in a group. An indication that a new hash function should be used is detected, and, in response to detecting the indication that a new hash function should be used, at least the plurality of identifiers is processed, using a second hash function different than the first hash function, to generate a second bit string. The second bit string is indicative of whether each of the plurality of identifiers is included in the group.