In today's world, the need to protect an organization's information and operating systems from attack is of critical importance. Johns Hopkins University's Master of Science in Information Assurance provides students with the technical foundations and applied knowledge necessary to defend information assets from technically sophisticated adversaries. This ten course graduate program, offered by one of the nation's most highly respected universities, gives working professionals the skills they need to protect national security information, institutional operating systems, or other high-value assets. Classes are conducted on weekday evenings and Saturdays at the Applied Physics Laboratory in Columbia, the Montgomery County Campus in Rockville, and the Dorsey Center in Elkridge, Maryland. Some classes are also offered in an online format.