broadcasting

Spreading an advertising message or signal over a wide area (or to all connected devices) without specific targeting. Unlike narrowcasting, broadcasting employs a shotgun approach in dissemination of information. See also multicasting and unicasting.

from www.businessdictionary.com

dissemination
散布（度）、種まき
宣伝、普及、流布

dissemination of culture
文化の伝承

dissemination of education
教育の普及

The widespread sale and dissemination of personal information is fueling the rise of identity theft.
個人情報の広範な売買や流布が「なりすまし犯罪」の増加を促している。