1. A computing device, including a dispersed storage (DS) processing module, comprises; a first processor within the computing device, that causes the computing device to: send a plurality of undecodeable portions of a plurality of data files via a public wireless communication network to one or more targeted devices of a private wireless communication network, wherein an undecodeable portion of a data file of the plurality of undecodeable portions represents one or more subsets of encoded data slices of one or more sets of encoded data slices, wherein each of the one or more subsets of encoded data slices of the one or more sets of encoded data includes less than a decode threshold number of encoded data slices to decode the data file, and wherein the data the is encoded using a dispersed storage error coding function to produce the one or more sets of encoded data slices; a second processor within the computing device that causes the computing device to: send a plurality of data content indicators regarding the plurality of data files; and a third processor within the computing device that causes the computing device to: in response to a selection of a data the of the plurality of data files based on a corresponding one of the plurality of data content indicators, send, via the private wireless communication network, one or more additional encoded data slices of each of the one or more sets of encoded data slices such that, for each of the one or more sets of encoded data slices, the one or more targeted devices obtains at least the decode threshold number of encoded data slices to decode the data file.