The full form of RPD is Recurrent Pattern Detection.

Recurrent Pattern Detection (RPD) technology overcomes the challenges listed above to detect and classify all types of
email-borne threat patterns in real-time. RPD is hosted in the CYREN GlobalView Cloud, which proactively analyzes
billions of Internet transactions daily.
RPD, based on CYREN’s U.S. patent #6,330,590, extracts and then analyzes relevant message patterns, which are used to
identify email-borne outbreaks. RPD classifies both distribution patterns and structure patterns and the analysis results
are stored in a vast database of classifications. In addition to identifying new threat patterns, RPD is also used to modify
or enhance classifications of already-identified message patterns. Local instances of RPD are used in the GlobalView
Cloud to accurately detect low volume or regional Outbound Spam in conjunction with CYREN’s Outbound Anti-Spam
solution.