1. A method, comprising: determining a plurality of destination nodes of a message; generating, on a source node, a probabilistic data structure that encodes each of the plurality of destination nodes without any false negatives and with zero or more false positives; and transmitting the message with the probabilistic data structure toward the plurality of destination nodes, wherein nodes receiving the message interpret the probabilistic data structure to determine whether the receiving node is probabilistically one of the intended plurality of destination nodes.