The market shift has been led by critical customer segments as much as by a vendor awakening. The US federal government is a significant player in changing the security marketplace. Cost factors are leading to the increasing use of commercial off-the-shelf (COTS) software. The Department of Homeland Security runs a software assurance forum where a broad tent of industry, academia and customers collaborate on better software development practices. The guide includes extensive due-diligence questionnaires covering software assurance areas such as architecture and design, software development, testing, manufacturing and packaging.”]
Source: https://www.csoonline.com/article/2123506/who-pushed-vendors-toward-better-security-.html