ProSiebenSat.1 to drop HD encryption on October 3/4September 18, 2015 13.07 Europe/London By Jörn KriegerGerman commercial TV group ProSiebenSat.1 will drop the encryption of the HD versions of its free-to-air channels on October 3/4, 2015, a ProSiebenSat.1 spokesperson confirmed to Broadband TV News.