FCW.com: “The Department of Homeland Security is requiring agencies to use new email and web security guidelines that address man-in-the-middle attacks. A binding operational directive from DHS gives federal agencies 90 days to implement a pair of tools, Domain-based Message Authentication Reporting and Conformance (DMARC) and STARTTLS. DMARC is an email authentication tool designed to prevent email spoofing and provide data on where a forgery may have originated. STARTTLS helps protect against passive man-in-the-middle attacks by allowing for email encryption while data is in transit.”