IBM Security Services Cyber Security Intelligence Index

IBM Managed Security Services continuously monitors tens
of billions of events per day for more than 3,700 clients in over
130 countries. This report is based on the cyber security event
data we collected between 1 April 2012 and 31 March 2013 in
the course of monitoring client security devices as well as data
derived from responding to and performing forensics on cyber
security incidents. It is complementary to the IBM X-Force
2012 Trend and Risk Report. Since our client profiles can differ
significantly across industries and company size, we have
normalized the data for this report to describe an average
client organization as having between 1,000 and 5,000
employees, with approximately 500 security devices
deployed within its network.