Blocking Steganosonic Data in Phone Calls

Slashdot notes that scientists at FH St. Polten are developing strategies to block out secret data in VoIP and GMS phone calls by modifying background noise as a means of invisibly and inaudibly preventing the attempted transmission of embedded secret data (see Google translation of the original German.) The modifications effectively destroy any hidden messages.

This development hearkens back to a Steganography software product that embeds data directly in an application's executable file without altering its function or filesize. For a description of this software see hydan.