National Cyber Awareness System (NCAS)
The National Cyber Awareness System produces advisories, alert and situation reports, analysis reports, current activity updates, daily summaries, indicator bulletins, periodic newsletters, recommended practices, a Weekly Analytic Synopsis Product (WASP), weekly digests, and year in review to alert partners of emerging cyber threats, vulnerabilities, and current activities.
us-cert.gov/mailing-lists-and-feeds
http://public.govdelivery.com/accounts/USDHSUSCERT/subscriber/new