White paper
Security
Website security threat report
5.5 billion malicious attacks were blocked in 2011
More than 5.5 billion malicious attacks were blocked in 2011, an increase of more than 81% from the previous year. This increase was in large part a result of a surge in polymorphic malware attacks, particularly from those found in Web attack kits and socially engineered attacks using email-borne malware.
